| 194 | | '''''Thursday, February 16th 2017''''' |
| 195 | | |
| 196 | | ''The repartition of particles over the tank is better when we arrive in the morning. During all the day, particles are added at the level of the laser beam following the same method than the previous day. The laser angle was changed from 60° to 75 °. Three interdependent parameters of the carrier can be tuned to set the forcing of the oscillating flat: T_flap, A_flap and Vmax_flap. We choose to set Vmax_flap to 3 cm/s to improve the comparison with the MITgcm simulations. Four experiments with different amplitudes and periods were performed to study the sensibility of the formation of topographic wave. In these experiments, we do not stop the record of the camera when we stop the flap to record what happen when the forcing is stopped.'' |
| 197 | | |
| 198 | | '''''EXP04''': '''Oscillation''' period 60s'' |
| 199 | | |
| 200 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 201 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 202 | | ||''PCO''||''after carriage''||''50ms''||''0.1''||''?''||''?''||''''''''''|| |
| 203 | | |
| 204 | | ''Laser parameters'' |
| 205 | | |
| 206 | | ||'''''Laser'''''||'''''Intensity'''''||'''''angle'''''||'''''d-3'''''||''''''''''||''d-2''''''''||''d-1''''''''||''d0''''''''||''d1''''''''||''d2''''''''||''d3''''''''|| |
| 207 | | ||''$(nm)$''||''$(Watt)$''||''$(°)$''||''$(cm)$''||''''''''''||''$(cm)$''||''$(cm)$''||''$(cm)$''||''$(cm)$''||''$(cm)$''||''$(cm)$''|| |
| 208 | | ||''532''||''25''||''75''||''''''''''||'||''''''''''||'||''''''''''||'||'||'|| |
| 209 | | |
| 210 | | '''''EXP05''': '''Oscillation''' period 40s'' |
| 211 | | |
| 212 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 213 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 214 | | ||''PCO''||''after carriage''||''50ms''||''0.5''||''?''||''?''||''''''''''|| |
| 215 | | |
| 216 | | '''''EXP06''': '''Oscillation''' period 80s'' |
| 217 | | |
| 218 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 219 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 220 | | ||''PCO''||''after carriage''||''50ms''||''0.5''||''?''||''?''||''''''''''|| |
| 221 | | |
| 222 | | '''''EXP07''': '''Oscillation''' period 20s'' |
| 223 | | |
| 224 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 225 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 226 | | ||''PCO''||''after carriage''||''50ms''||''0.5''||''?''||''?''||''''''''''|| |
| 227 | | |
| 228 | | ''At the end of the day, we want to perform an experiment with the laser in the upper layer but the upper limit of the laser is inside the layer of transition between the upper and lower layer. Consequently, it changes the angle of the laser due to the refraction of the beam into the inhomogeneous layer. This upper limit is fixed by the position of the mirror on which the laser beam is reflected that need to be moved when the tank is empty.'' |
| 229 | | |
| 230 | | '''''Friday, February 17th 2017''''' |
| 231 | | |
| 232 | | ''This day is dedicated to the formation of the coastal current in the upper layer.'' |
| 233 | | |
| 234 | | ''For the moment, the control of the flow rate is complicated. It can be done by tuning the opening of one valve and estimating the flow rate in the tanks above the platform. It is done by looking at the evolution of the water levels at during 1 minute given by a stopwatch. This is not precise and it takes time to reach the flow rate targeted. We have to build and test some diaphragms to reduce the size of the pipe. Each diagram will be associated with a flow rate which will be constant.'' |
| 235 | | |
| 236 | | ''There is no laser in the upper layer. The particles are directly mixed with the water in the tanks above the platform before their injection in the surface layer. These particles are lighted by the diffusion of the laser from below. Consequently, it is possible to see the water added by the injectors into the upper layer but all the other part of this layer are not visible. Indeed, the signal of the particle at the depth of the laser beam (i.e. in the lower layer) is too strong. This is a main problem that has to be changed by moving up the mirror which reflect the laser.'' |
| 237 | | |
| 238 | | ''The stratification is not very good when filling from the bottom of the tank. The process will consequently be changed. The tank will firstly be filled with the salty water. The upper layer will be added directly into the surface layer using diffusers.'' |
| 239 | | |
| 240 | | ''The laser stopped by itself during the experiment 8. This happened also shortly after the beginning of an experiment we did not save as no water injected had not enough time to reach the camera field-of-view. The problem comes from the tarpaulin of the platform which is close to the fan of the laser cooler. This blocks the evacuation of the air and increase the temperature inside the laser device. To prevent any damage, the laser is automatically shut down when a maximum temperature is reached. Now, the tarpaulin is open behind the cooler but it results in a hole letting the air to enter inside the platform. Moreover, the fan of the cooler might warm the water surface locally which can perturb the upper surface. Consequently, the cooler has to be put outside the tarpaulin to prevent all these effects.'' |
| 241 | | |
| 242 | | ''The exit of the injector is not along the wall as it exists a gap of 20.5 cm. A large amount of the water injected turn to the right when it is injected and do not flow along the wall. This effect reduces when the flow rate is increased. It needs a flow rate by far superior (30 l/min) than what it was planned (7 l/min). Moreover, the separation of the flow due to the geometry adds a lot of perturbation that lead to the creation of large eddies. For example, a large cyclonic eddy stays close to the exit of the injector for a flow rate of 7l/min. We need to prevent this effect adding a wall between the onshore part of the injector and the wall. This solution was tested with a wooden sheet hold by hand which seems to drastically reduce this effect. A fixed one will be added when the platform will be empty on Monday.'' |
| 243 | | |
| 244 | | ''All the different problems mentioned before will be solved when the platform will be empty on Monday. Three experiments were performed but, as the flow is perturbed in many ways, we do not think that it will be representative of the flow when the different problems will be solved.'' |
| 245 | | |
| 246 | | '''''EXP08''': '''Injection''' flow rate 7.2 l/min'' |
| 247 | | |
| 248 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 249 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 250 | | ||''PCO''||''after carriage''||''50ms''||''0.5''||''?''||''?''||''''''''''|| |
| 251 | | |
| 252 | | '''''EXP09''': '''Injection''' flow rate 7.4 l/min'' |
| 253 | | |
| 254 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 255 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 256 | | ||''PCO''||''after carriage''||''50ms''||''0.5''||''?''||''?''||''''''''''|| |
| 257 | | |
| 258 | | '''''EXP10''': '''Injection''' flow rate 35.3 l/min to 60 l/min. We increased the flow rate from 35.3 l/min to 60 l/min after XXXX minutes of recording the see its impact on the formation of the coastal current.'' |
| 259 | | |
| 260 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 261 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 262 | | ||''PCO''||''after carriage''||''50ms''||''0.5''||''?''||''?''||''''''''''|| |
| 263 | | |
| 264 | | '''''Monday, February 20th 2017''''' |
| 265 | | |
| 266 | | ''The platform is empty in the morning.'' |
| 267 | | |
| 268 | | ''The day begins by the calibration of the two CTD sensors using 7 samples which span from 998.6 to 1025.1 kg/m3. One 2nd order polynomial regression is applied for each of them to define the relation between the voltage measured and the water density. The profiles obtained are presented in the following figure.'' |
| 269 | | |
| 270 | | ''[[Image(http://img11.hostingpics.net/pics/702568Profilesweek1.png)]]'' |
| 271 | | |
| 272 | | ''All the distance between each element of the experimental setup and the point of reference along the wall are measured. A schematic of the setup of the first week called smooth shelf configuration is presented in the following figure.'' |
| 273 | | |
| 274 | | ''[[Image(http://img11.hostingpics.net/pics/181661Setup1.png)]]'' |
| 275 | | |
| 276 | | ''The three downstream plastic sheets were removed to replace them by a triangle which make the transition between the slope and the flat floor. Along the wall, it results in 6.75m of constant shell, 2.74m of transition and 3.27m of flat bottom.'' |
| 277 | | |
| 278 | | ''The calibration of two of the three fixed cameras is also done using a target of 2mx2m in the field of view of each of them. Firstly, the target is kept horizontal for the first pictures. Then, it is moved in all directions to have a 3D representation of the target that help to correct the picture. This calibration is not done for the camera recording the flap and the injector as we did not succeed to have a clear picture in the computer.'' |
| 279 | | |
| 280 | | ''We saw last week that a lot of turbulence is created at the exit of the injector. A schematic of what was observed is presented in the following figure.'' |
| 281 | | |
| 282 | | ''[[Image(http://img11.hostingpics.net/pics/367738Currentreturn.png)]]'' |
| 283 | | |
| 284 | | ''To prevent these perturbations, the shelf is extended and now the exit of the injector is above the shelf to ensure that the water flow directly above it. Secondly, a vertical plastic sheet that link the exit of the injector and the wall is added. We hope that this will prevent the return of the current below the injector and will help the injected water to reach directly the vertical wall.'' |
| 285 | | |
| 286 | | '''''Tuesday, February 21th 2017''''' |
| 287 | | |
| 288 | | ''The position of the carrier is changed. The flap is now linked to the downstream edge of the carrier to improve the field of view in the cameras upstream of the transition area.'' |
| 289 | | |
| 290 | | ''The laser length is now changed to 90°. The mirror of the laser is also lifted of 8cm to have the laser sheet in the upper homogeneous layer. The laser device is also rotated to have enough light both over the transition area and over the flat bottom.'' |
| 291 | | |
| 292 | | ''All the distance between each element of the second experimental are measured. A schematic of the setup of the second week in the canyon configuration is presented in the following figure.'' |
| 293 | | |
| 294 | | ''[[Image(http://img11.hostingpics.net/pics/189036Setup2.png)]]'' |
| 295 | | |
| 296 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 297 | | ||''H_coast (cm)''||''''''''''||'||''18''||''''''''''||'|| |
| 298 | | ||''H_laser_up (cm)''||''''''''''||'||''''''''''||'||''''''''''|| |
| 299 | | ||''H_laser_down (cm)''||''''''''''||'||''''''''''||'||''''''''''|| |
| 300 | | |
| 301 | | '''''Wednesday, February 22th 2017''''' |
| 302 | | |
| 303 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 304 | | ||''H_coast (cm)''||''19.7''||''19''||''18''||''18.5''||''19''|| |
| 305 | | ||''H_laser_up (cm)''||''/''||''/''||''/''||''/''||''/''|| |
| 306 | | ||''H_laser_down (cm)''||''9.5''||''3.5''||''4''||''7.3''||''/''|| |
| 307 | | |
| 308 | | ''A CTD profile recorded this morning can be compared to the one recorded at the end of the day yesterday in the following figure : [[Image(http://img11.hostingpics.net/pics/644040Profilesweek2.png)]]'' |
| 309 | | |
| 310 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 311 | | ||''H_coast (cm)''||''19''||''18''||''18.5''||''18''||''18.8''|| |
| 312 | | ||''H_laser_up (cm)''||''/''||''/''||''/''||''/''||''/''|| |
| 313 | | ||''H_laser_down (cm)''||''6''||''2.5''||''3.5''||''5''||''/''|| |
| 314 | | |
| 315 | | ''Bottom density => 1009.5 (T 20.9) Surface density => 1002 (T 19.9)'' |
| 316 | | |
| 317 | | ||''Lumenera[[BR]]Settings''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''||''gain''|| |
| 318 | | ||''EXP12''||''283''||''1.83''||''4000x1600''||''200''||''2.33''||''39''||''4.43''|| |
| 319 | | ||''EXP13''||''283''||''1.83''||''4000x1600''||''200''||''2.33''||''39''||''4.43''|| |
| 320 | | ||''EXP14''||''545-560''||''1.83''||''4000x1600''||''200''||''2.33''||''39''||''4.64''|| |
| 321 | | |
| 322 | | '''''Thursday, February 23th 2017''''' |
| 323 | | |
| 324 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 325 | | ||''H_coast (cm)''||''19''||''18.7''||''18''||''18''||''18.5''|| |
| 326 | | ||''H_laser_up (cm)''||''/''||''/''||''/''||''/''||''/''|| |
| 327 | | ||''H_laser_down (cm)''||''/''||''6.6''||''3.4''||''2.5''||''/''|| |
| 328 | | |
| 329 | | ''Changeemnt de sonde aprés EXP15, C0 est déplacé et maintenant devient C2. La nouvelle sonde C0 est à la place de l'ancienne C0. Surface nouvelle C0/TO 371 surface libre. C2 est ajoutée aux données lors de l'expérience 17. Le gain de cette dernière est modifié aprés 5min de cette même expérience.'' |
| 330 | | |
| 331 | | ||''Lumenera[[BR]]Settings''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''||''gain''|| |
| 332 | | ||''EXP15''||''550-560''||''1.83''||''4000x1600''||''200''||''3.26''||''39''||''4.43''|| |
| 333 | | ||''EXP16''||''550-560''||''1.83''||''4000x1600''||''200''||''3.26''||''39''||''7-9''|| |
| 334 | | ||''EXP17''||''570''||''1.83''||''4000x1600''||''200''||''3.26''||''39''||''13''|| |
| 335 | | |
| 336 | | '''''Friday, February 24th 2017''''' |
| 337 | | |
| 338 | | ''Position of the flap changed in the morning. A schema of the two positions is given in the following figure.'' |
| 339 | | |
| 340 | | ''[[Image(http://img11.hostingpics.net/pics/873471FlapPositions.png)]]'' |
| 341 | | |
| 342 | | ||''Lumenera[[BR]]Settings''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''||''gain''|| |
| 343 | | ||''EXP18''||''576''||''1.83''||''4000x1600''||''220''||''3.26''||''39''||''3.64''|| |
| 344 | | ||''EXP19''||''576''||''1.83''||''4000x1600''||''220''||''3.26''||''39''||''3.9''|| |
| 345 | | ||''EXP20''||''577''||''1.83''||''4000x1600''||''220''||''3.26''||''39''||''3.9''|| |
| 346 | | ||''EXP21''||''599''||''1.83''||''4000x1600''||''220''||''3.26''||''38.6''||''7''|| |
| 347 | | |
| 348 | | '''''EXP18''': '''Oscillation''''' |
| 349 | | |
| 350 | | ''Problem of data recording with the PCO camera during the experiment 18. First 4'35 of the record were not stored due to a lack of disk space.'' |
| 351 | | |
| 352 | | ''We stopped the recording before the end of the experiment as the number of particles was not sufficient.'' |
| 353 | | |
| 354 | | '''''EXP19''': '''Oscillation''''' |
| 355 | | |
| 356 | | '''''EXP21''': '''Oscillation''' period 80s'' |
| 357 | | |
| 358 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 359 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 360 | | ||''PCO/FALCON/Lumenera''||''before carriage''||''50ms''||''0.3''||''?''||''?''||''''''''''|| |
| 361 | | |
| 362 | | [[BR]]'''''Monday, February 27th 2017''''' |
| 363 | | |
| 364 | | ''The extraction of the surface layer during the weekend did not succeed. 15 cm of water was extracted but there is still a stratification on the profiles.'' |
| 365 | | |
| 366 | | ''The remaining water is mixed by hand and the 15 last centimetres are added using water with the density of the bottom layer. The final density is 1009.1 g/m!^3 at 20.2°C. The difference of height with two layers stratification is less than 1 mm.'' |
| 367 | | |
| 368 | | ''Checked the horizontal of the laser sheet.Change the flat position to have its reference perpendicular to the wall.'' |
| 369 | | |
| 370 | | ''The mixing of the water re-suspend the particles in all the water column. The repartition is now homogeneous but they are in all different layers but not only at the position of the laser sheet. The resulting pictures are less complicated to interpret by eyes because the fronts are less obvious.'' |
| 371 | | |
| 372 | | '''''EXP22''': '''Oscillation''' '''__Barotropic__''' period 60s amplitude 16cm'' |
| 373 | | |
| 374 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 375 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 376 | | ||''PCO/FALCON/Lumenera''||''before carriage''||''50ms''||''0.3''||''?''||''?''||''''''''''|| |
| 377 | | |
| 378 | | '''''EXP23''': '''Oscillation''' '''__Barotropic__''' period 60s amplitude 46cm'' |
| 379 | | |
| 380 | | ||'''''Cameras'''''||'''''location'''''||'''''exposure'''''||'''''dt'''''||'''''size'''''||'''''avg scale'''''||''''''''''|| |
| 381 | | ||''''''''''||'||''$(ms)$''||''$(s)$''||''$pix.pix$''||''$pix/cm$''||''''''''''|| |
| 382 | | ||''PCO/FALCON/Lumenera''||''before carriage''||''50ms''||''0.3''||''?''||''?''||''''''''''|| |
| 383 | | |
| 384 | | ''The recycling of the water is started at the end of the day.'' |
| 385 | | |
| 386 | | [[BR]]'''''Wednesday, March 1st 2017''''' |
| 387 | | |
| 388 | | ''Injector, reduction of its surface'' |
| 389 | | |
| 390 | | '''''EXP23''': '''Inejctor''' '''diaphragm 19mm "''''' |
| 391 | | |
| 392 | | '''''EXP24''': '''Inejctor''' '''diaphragm 15mm "''''' |
| 393 | | |
| 394 | | ''We test the relation between the flow rate $Q[L/min]$ and the diameter of the diaphragm $D[mm]$. The relation gives the following figure.^^'' |
| 395 | | |
| 396 | | ''[[Image(http://img4.hostingpics.net/pics/450503Diaphragmflowrate.png)]]'' |
| 397 | | |
| 398 | | ||''Lumenera[[BR]]Settings''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''||''gain''|| |
| 399 | | ||''EXP24''||''320''||''1.44''||''4000x1800''||''220''||''3.26''||''39''||''3.64''|| |
| 400 | | ||''EXP25''||''320''||''1.44''||''4000x1800''||''220''||''3.26''||''39''||''1.8-10[[BR]]''|| |
| 401 | | |
| 402 | | ''''''''''' |
| 403 | | |
| 404 | | '''''Thursday, 2 of March 2017''''' |
| 405 | | |
| 406 | | ||''Lumenera[[BR]]Settings''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''||''gain''|| |
| 407 | | ||''EXP27''||''322''||''1.1''||''4000x1800''||''220''||''3.26''||''39''||''1-8''|| |
| 408 | | ||''EXP28''||''322''||''1.1''||''4000x1800''||''220''||''3.26''||''39''||''1-8[[BR]]''|| |
| 409 | | |
| 410 | | ''Dist from surface =>1=>Hcoast=18cm Laser_surf=3.4cm; -1=>LAser_surf=3.2cm, 0=>Hcoast=18cm LAser_surf=5.2cm'' |
| 411 | | |
| 412 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 413 | | ||''H_coast (cm)''||''''''''''||''18??''||''18''||''18''|| |
| 414 | | ||''H_laser_up (cm)''||''''''''''||''14.6''||''12.8''||''14.8''||'|| |
| 415 | | ||''H_laser_down (cm)''||''''''''''||'||''''''''''||'||''''''''''|| |
| 416 | | |
| 417 | | ''Samuel starts the day by calibrating ultrasound probes. He also changed on probe (Acq 3. Third from the wall). Values are stored in the file : calib probe 02/03. He different positions are : 0/-0.5/-1/+1/+0.5/0'' |
| 418 | | |
| 419 | | ''Profile made this morning is presented in the following figure. [[Image(http://img11.hostingpics.net/pics/601827Profilesweek3.png)]]'' |
| 420 | | |
| 421 | | ''EXP27=> change of the laser position at 09.39.'' |
| 422 | | |
| 423 | | '''''Friday, 3 of March 2017''''' |
| 424 | | |
| 425 | | ||''Lumenera[[BR]]Settings''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''||''gain''|| |
| 426 | | ||''EXP29''||''320''||''1.18''||''4000x1800''||''220''||''3.26''||''39''||''1-8''|| |
| 427 | | ||''EXP30''||''320''||''1.18''||''4000x1800''||''220''||''3.26''||''39''||''1-8[[BR]]''|| |
| 428 | | |
| 429 | | ''We lifted the ultrasound sensors of 42mm.'' |
| 430 | | |
| 431 | | ''EXP29 =>10h19 13 D (FPS 3)'' |
| 432 | | |
| 433 | | ''Mooving of the sensor closer to the wall'' |
| 434 | | |
| 435 | | ''EXP30 =>11h46 16 D (FPS 10)'' |
| 436 | | |
| 437 | | ''EXP31 =>14h42 19 D (FPS 10)'' |
| 438 | | |
| 439 | | ''EXP32 =>16h08 15 D (FPS 10)'' |
| 440 | | |
| 441 | | '''''Wednesday, 8 of March 2017''''' |
| 442 | | |
| 443 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 444 | | ||''H_coast (cm)''||''''''''''||'||''19''||''18''|| |
| 445 | | ||''H_laser_up (cm)''||''''''''''||'||''15''||''14.3''||''''''''''|| |
| 446 | | ||''H_laser_down (cm)''||''''''''''||'||''''''''''||'||''''''''''|| |
| 447 | | |
| 448 | | ''EXP33 =>14h55 10.5 D (FPS 3) Problems with the camera PCO at the beginning. We need to compare the date of the first record with the trigger to obtain its time of start (~15h08).'' |
| 449 | | |
| 450 | | ''Changement de vanne suite à une fuite.'' |
| 451 | | |
| 452 | | ''EXP34 =>16h26 15 D (FPS 3) Problems with the camera FALCON at the beginning. Delay of 201 frames with Dalsa2'' |
| 453 | | |
| 454 | | ''EXP35 =>17h56 19 D (FPS 3) Problems with the camera FALCON at the beginning. Several start of the trigger recorded are not representative of the start of the camera.'' |
| 455 | | |
| 456 | | ||''Lumenera[[BR]]Settings''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''||''gain''|| |
| 457 | | ||''EXP29''||''320''||''1.18''||''4000x1800''||''220''||''3.26''||''39''||''1-8''|| |
| 458 | | ||''EXP30''||''320''||''1.18''||''4000x1800''||''220''||''3.26''||''39''||''1-8[[BR]]''|| |
| 459 | | |
| 460 | | '''''Thursday, 9 of March 2017''''' |
| 461 | | |
| 462 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 463 | | ||''H_coast (cm)''||''''''''''||''19.5''||''19.7''||''18.2''|| |
| 464 | | ||''H_laser_up (cm)''||''''''''''||''17''||''16''||''15.5''||'|| |
| 465 | | ||''H_laser_down (cm)''||''''''''''||'||''''''''''||'||''''''''''|| |
| 466 | | |
| 467 | | ''Lumenera Settings'' |
| 468 | | |
| 469 | | ||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''||''gain''|| |
| 470 | | ||''EXP36''||''322''||''1.15''||''4000x1800''||''150''||''3.26''||''39''||''1-8''|| |
| 471 | | ||''EXP37''||''310''||''1.2''||''4000x1800''||''200''||''1.7''||''37''||''2-9''|| |
| 472 | | ||''EXP38''||''310''||''1.2''||''4000x1800''||''200''||''1.7''||''37''||''10-12''|| |
| 473 | | |
| 474 | | [[BR]]''EXP36 =>[11h09:The 11h09]:50 The laser sheet before the wall pass through a clean (light) fluid layer without particles. This new option provides a significant increase of the intensity of illuminated particles in the experimental area !! Good option to keep for the next experiments.'' |
| 475 | | |
| 476 | | ''Diaphragm 9mm / flow rate 24 lit/min'' |
| 477 | | |
| 478 | | ''EXP37 => 14h12:30'' |
| 479 | | |
| 480 | | ''Diaphragm 11.5mm / flow rate 33 lit/min (?? strange value according to the previous fit)'' |
| 481 | | |
| 482 | | ''The position of lumen era camera was changed for this experiment and new calibration done.'' |
| 483 | | |
| 484 | | ''Very nice upstream current with a well defined unstable wavelength on the steep slope.'' |
| 485 | | |
| 486 | | ''EXP38 => 15h58'' |
| 487 | | |
| 488 | | ''Diaphragm 13mm / flow rate 55 lit/min'' |
| 489 | | |
| 490 | | ''Very nice upstream current with a well defined unstable wavelength on the steep slope. We test in the middle of the acquisition the laser sheet in the lower layer (-13cm). It confirms that the velocity in the lower layer is very weak.'' |
| 491 | | |
| 492 | | '''''Friday, 10 of March 2017''''' |
| 493 | | |
| 494 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 495 | | ||''H_coast (cm)''||''''''''''||''20''||''20''||''19''|| |
| 496 | | ||''H_laser_up (cm)''||''''''''''||''19''||''17''||''16''||'|| |
| 497 | | ||''H_laser_down (cm)''||''''''''''||'||''''''''''||'||''''''''''|| |
| 498 | | |
| 499 | | ''Lumenera Settings'' |
| 500 | | |
| 501 | | ||''''''''''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''|| |
| 502 | | ||''EXP39''||''310''||''1.2''||''4000x1800''||''200''||''1.7''||''37''||''1-8''|| |
| 503 | | ||''EXP40''||''310''||''1.2''||''4000x1800''||''200''||''1.7''||''37''||''17''|| |
| 504 | | ||''EXP40[[BR]]video2''||''311''||''1.2''||''4000x1800''||''100''||''1.7''||''37''||''14''|| |
| 505 | | ||''EXP41''||''311''||''1.2''||''4000x1800''||''100''||''1.7''||''37''||''17''|| |
| 506 | | ||''EXP42''||''311''||''1.2''||''4000x1800''||''100''||''1.7''||''37''||''17-20''|| |
| 507 | | ||''EXP43''||''311''||''1.2''||''4000x1800''||''100''||''1.7''||''37''||''13-16''|| |
| 508 | | ||''EXP43_2''||''176''||''1.2''||''4000x1800''||''50''||''2.8''||''46''||''23''|| |
| 509 | | |
| 510 | | [[BR]]''We start today with a frontal density current (like a buoyant river plume). In other words the injection of fresh water in a deepd fluid layer of uniform density.'' |
| 511 | | |
| 512 | | ''EXP39 start injection around =>09h20'' |
| 513 | | |
| 514 | | ''Diaphragm 9mm / flow rate 24 lit/min'' |
| 515 | | |
| 516 | | ''fps of PCO, DALSA, FALCON stays at 3 images/s'' |
| 517 | | |
| 518 | | ''A very thin (small width) current flow along the wall, no apparent signature of instability or any meander formation . But due to the curvature of the laser sheet we didn't see what happens at the same depth everywhere... we are quite deep at the center (M0) of the wall while much closer to the surface at (M1 and M-1).'' |
| 519 | | |
| 520 | | ''EXP40 =>10h06'' |
| 521 | | |
| 522 | | ''Diaphragm 13mm / flow rate 54 lit/min'' |
| 523 | | |
| 524 | | ''Always a stable density front with almost no impact of the bottom shelf bathymetry...'' |
| 525 | | |
| 526 | | ''We forget to take a density profile inside the current ! grrr...'' |
| 527 | | |
| 528 | | ''EXP41 =>10h!37:55'' |
| 529 | | |
| 530 | | ''fps of PCO, DALSA, FALCON was changed to 10 images/s and for all the records below'' |
| 531 | | |
| 532 | | ''Diaphragm 15mm / flow rate 75lit/min'' |
| 533 | | |
| 534 | | ''Always a stable density front with a slight change on the width of the current from steep to gentle slope, but not sure that it is note due to the curvature of the laser sheet ...'' |
| 535 | | |
| 536 | | ''EXP42 =>11h!05:55'' |
| 537 | | |
| 538 | | ''Diaphragm 17mm / flow rate 88 lit/min'' |
| 539 | | |
| 540 | | ''Always a stable density front with a slight change on the width of the current from steep to gentle slope, but not sure that it is note due to the curvature of the laser sheet ...'' |
| 541 | | |
| 542 | | ''Several density profiles were done inside the coastal front.'' |
| 543 | | |
| 544 | | ''EXP43 =>14h!32:30'' |
| 545 | | |
| 546 | | ''Diaphragm 19mm / flow rate 120 lit/min'' |
| 547 | | |
| 548 | | ''A roughly stable front with some few meanders or stretched eddies at the edge of the front.'' |
| 549 | | |
| 550 | | '''''Wednesday, 15 of March 2017''''' |
| 551 | | |
| 552 | | ||''Position''||''M2''||''M1''||''M0''||''M-1''||''M-2''|| |
| 553 | | ||''H_coast (cm)''||''''''''''||''6.6''||''6.9''||''7''|| |
| 554 | | ||''H_laser_up (cm)''||''''''''''||''4.6''||''2.1''||''4''||'|| |
| 555 | | ||''H_laser_down (cm)''||''''''''''||'||''''''''''||'||''''''''''|| |
| 556 | | |
| 557 | | ''Lumenera Settings'' |
| 558 | | |
| 559 | | ||''''''''''||''mean_dt[[BR]](ms)''||''mean_dx[[BR]](pix/mm)''||''Area[[BR]](pix/pix)''||''exposure[[BR]](ms)''||''contrast''||''brightness''|| |
| 560 | | ||''EXP44''||''''''''''||''1.2''||''4000x1800''||''150''||''2.8''||''46''||''6-10''|| |
| 561 | | ||''EXP45''||''''''''''||''1.2''||''4000x1800''||'||''''''''''||'||''17''|| |
| 562 | | ||''EXP46[[BR]]''||''''''''''||''1.2''||''4000x1800''||'||''''''''''||'||''14''|| |
| 563 | | ||''EXP47''||''''''''''||''1.2''||''4000x1800''||''200''||''2.8''||''46''||''14''|| |
| 564 | | |
| 565 | | ''EXP44 =>08h48 fin 9h28'' |
| 566 | | |
| 567 | | ''Diaphragm 9mm / flow rate 24 lit/min'' |
| 568 | | |
| 569 | | ''A clear stagnation point occurs along the coast where the bathymetric slope changes. The impact of the bottom bathymetry is significantly stronger now.'' |
| 570 | | |
| 571 | | ''On the other hand with the 40s period of rotation there is more vibration of the platform which may affect the stability of the recording cameras.'' |
| 572 | | |
| 573 | | ''EXP45 =>10h10 fin ?'' |
| 574 | | |
| 575 | | ''Diaphragm 13mm / flow rate 48 lit/min'' |
| 576 | | |
| 577 | | ''The coastal current (and the eddies) pass over the bathymetric change without any stagnation points'' |
| 578 | | |
| 579 | | ''EXP46 => 11h49 end 12h26'' |
| 580 | | |
| 581 | | ''Diaphragm 10.5mm / flow rate 34.5 lit/min'' |
| 582 | | |
| 583 | | ''Here again a stagnation point appears at the change of the bathymetric slope and the coastal flow is strongly reduced along the wall on the gentles slope area.'' |
| 584 | | |
| 585 | | ''EXP47 =>14h11 end 15h00'' |
| 586 | | |
| 587 | | ''Diaphragm 7.5mm / flow'' |
