Changes between Version 59 and Version 60 of WikiStart


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Timestamp:
Sep 27, 2017, 10:22:57 AM (3 years ago)
Author:
steiger5na
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  • WikiStart

    v59 v60  
    145145oarsub -I -l walltime=10:0:0 (to change your access time to 10h instead of 2)
    146146
    147 matlab
     147Now you can open matlab
    148148
    149149In uvmat>Run>field series>run mode change to "cluster oar"
    150150
    151 == 5.3 How to process the data ==
    152 In uvmat select the Run>field series then open>browse qnd you should select an experiment. You can find every experiment in fsnet>project>coriolis>2017>17ICESHELF>DATA>EXPXX. The file EXPXX is for the horizontal laser sheet, EXPXX_SCAN is for the horizontal scanning and EXPXX_VERT for the vertical sheet.
    153 
    154 If you choose EXPXX you will get three files : FALCON, PC01 and PC02. These are the three cameras we are using during the experiments, the FALCON is the camera for the vertical sheet and will only be used to get the time parameters. The data from the PC01 and PC02 need to be treated in order to perform the ''PIV''.
    155 
    156 The first step is to convert .tif into .png, in Run>Field series you can open any .tif of the desired folder (Warning : you should not take the im.tif but any im@XXXX.tif is working). Then in the ''Action'' part you should select "extract_multitif", if the Input button is in pink you should click on it and give to the software a .xml with informations about your experiment. Once it is done you can click on RUN, don't forget to select "cluster_oar" in the run mode, the action will be much faster. When it is done a new folder called PCYY.png is created in your EXPXX folder and contains all the png.
     151== 5.3 How to connect to the server from home ==
     152On Linux:
     153
     154- Create a tunnel on command line: ssh -L !2222:servcalcul7a:22  username@legilnx02.legi.grenoble-inp.fr[[BR]]- Install X2GoClient (Remote desktop client) and start it[[BR]]- In upper left corner, you can create a new session. The setup for the server is: Host: localhost; Login: username; SSH port: 2222[[BR]]- Once the session is created, you can click on it, enter you password and then you are working on one of the LEGI computers.
     155
     156On Windows: As Elin!
     157
     158== 5.4 How to process the data ==
     159All experiments are saved in fsnet>project>coriolis>2017>17ICESHELF>DATA>EXPXX. The  file EXPXX is for the horizontal laser sheet, EXPXX_SCAN is for the  horizontal scanning and EXPXX_VERT for the vertical sheet.  Within each EXPXX you will get three files : FALCON, PC01 and PC02.  These are the three cameras we are using during the experiments, the  FALCON is the camera for the vertical sheet and will only be used to get  the time parameters. The data from the PC01 and PC02 need to be treated  in order to perform the ''PIV''.
     160
     161 1. '''Copy the files from the computer of the cameras'''. [[BR]]- The images from the vertical camera are saved on the local computer in G: and have to be copied into the folder FALCON in the corresponding experiment. [[BR]]- The images from PCO1 (camera at the inflow) are saved on D: of the remote desktop connection that ends with 151. The images have the be copied into the folder PCO1 of the corresponding experiment.[[BR]]- The images from PCO2 (camera above the trough) are saved on D: of the remote desktop connection that ends with 150. The images have to be copied into the folder PCO2 of the corresponding experiment.
     162 1. '''Get the .xml file with timing information'''[[BR]]In uvmat select the Run>field series then open>browse and select an experiment. Go in the folder within the FALCON and select the *.seq file. Choose "extract_rdvision_times" in the Action part, click on Input and Run. This will create a "Falcon.xml" within the FALCON folder.
     163 1. '''Convert .tif into .png[[BR]]I'''n Run>Field series you can open any .tif of the desired folder (Warning : you should not take the im.tif but any im@XXXX.tif is working). Then in the ''Action'' part you should select "extract_multitif", if the Input button is in pink you should click on it and give to the software a .xml with informations about your experiment. Once it is done you can click on RUN, don't forget to select "cluster_oar" in the run mode, the action will be much faster. When it is done a new folder called PCYY.png is created in your EXPXX folder and contains all the png.[[BR]]
    157164
    158165The next step is to use these png images in the Fields series as before, with the action ''sub_background'' that will remove all the motionless structures.  For the input you have to make sure that the 'image rescaling coefficient' is equal to 2 and then make is run. (This process takes a long time, don't forget to make it run on the cluster). The output of this action is a file PCYY.png.sback filed with png images.
     
    505512The flow rate of 20 l/min (8.5mm diameter) gave a measured flow rate of 20 l/min.
    506513
    507 Probes: downward velocity: 2 cm/s; upward velocity: 5 cm/s; break at the surface: 10s. In total 10 repetitions. The height of the probes are adjusted to follow the slope. They start about 20.5 cm above the slope so that only the probe furthest away from the coast touches the water, the others stay above the surface. During the profiles they get lowered by 19 cm. 
     514Probes: downward velocity: 2 cm/s; upward velocity: 5 cm/s; break at the surface: 10s. In total 10 repetitions. The height of the probes are adjusted to follow the slope. They start about 20.5 cm above the slope so that only the probe furthest away from the coast touches the water, the others stay above the surface. During the profiles they get lowered by 19 cm.
    508515
    509516Scans: 11 levels (55:-2:35) with 5 images at each level. dt = 100ms and dt1 = 1000ms. Exposure time was 30ms.
    510517
    511 Observations: The flow was very fast and a nice clear front developed. In the beginning the water formed a vortex just after the first corner, and then most of the flow entered on the shelf between the first and the second corner. On the vertical slice, the front was clearly visible, but it was very steep, so that it may be above the laser sheets. 
     518Observations: The flow was very fast and a nice clear front developed. In the beginning the water formed a vortex just after the first corner, and then most of the flow entered on the shelf between the first and the second corner. On the vertical slice, the front was clearly visible, but it was very steep, so that it may be above the laser sheets.
    512519
    513520Note1: The vertical camera is too far up for the experiments with density difference, as the free surface is not visible. It will be put further down for the following experiments.
     
    522529Probes: We kept the same setup as EXP29, but did now 20 profiles.
    523530
    524 Observations: The flow turn onto the shelf at the second corner and followed the topography also on southern side of the topography. After a while, a vortex developed in the trough and parts of the main flow entered this vortex. 
     531Observations: The flow turn onto the shelf at the second corner and followed the topography also on southern side of the topography. After a while, a vortex developed in the trough and parts of the main flow entered this vortex.
    525532
    526533Note: In the beginning of the experiment, the water was still in motion from the previous experiment due to the density difference.
     
    533540
    534541=== Experiment EXP32 ===
    535 Now, we removed the corner and did an experiment with 50 l/min flow rate (12.6 mm), which gave 52 l/min. dt = 50ms, E=20ms. 
    536 
    537 Observations: The flow went straight around the 1st corner and followed the topography. 
     542Now, we removed the corner and did an experiment with 50 l/min flow rate (12.6 mm), which gave 52 l/min. dt = 50ms, E=20ms.
     543
     544Observations: The flow went straight around the 1st corner and followed the topography.
    538545
    539546Notes: The water was still in motion in the trough from the previous experiment and due to the density difference. It looked like the particles started settling down, which may create vertical motion. It may be, that there was already a fresh water layer at the surface that influenced the flow, but also the laser height.
    540547
    541548=== Experiment EXP33 ===
    542 This experiment was with a low flow rate of 20 l/min and had to be stopped after a while as there was a too strong stratification. The laser then  got deflected downward at the interface between the two densities and was only about 1-0 cm above the topography on the shelf.
     549This experiment was with a low flow rate of 20 l/min and had to be stopped after a while as there was a too strong stratification. The laser then  got deflected downward at the interface between the two densities and was only about 1-0 cm above the topography on the shelf.
    543550
    544551  '''' ''6 - Table of Experiments: '''''