# Changes between Version 30 and Version 31 of WikiStart

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Sep 12, 2017, 6:30:54 PM (3 years ago)
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• ## WikiStart

 v30 ||Date Campaign End||27/10/2017|| =  = = ''6 - Table of Experiments: '' = ||'''''Exp No.'''''||'''''Name'''''||'''''Valve opened'''''||'''''$H_{water}$'''''||'''''$T_{rot}$'''''||'''''$Q$'''''||'''''$R_{curvature}$'''''||'''''$\Delta \rho$'''''||'''''Diaphragme'''''||''''' Flowrate estimated'''''||''''' Type of photo'''''||'''''Time photo'''''||''''' Dye'''''||'''''Comments'''''||''' Notes'''|| ||||||||$(m)$||$(s)$||$(L min!^{-1})$||$(m)$||$(kg m!^{-3}$||$(mm)$||$H_1,H_2,\Delta t$||VS/HS/Scan||t1/t2/t3||yes / no|||| ||0||test||11092017 __[hh:mm hh:mm]__||0.604||50||58.5||0.50||0||13||170,150,41s||VS||?||yes||Dye did not show up in photos :-(||Elin|| |||||||||||||||||||||||| |||||||||||||||||||||||| |||||||||||||||||||||||| ||1||exp01||??092017 __[hh:mm hh:mm]__||0.60||50||?||0.50||0||13||||HS / Scan|| =  = ||'''''Exp No.'''''||'''''Name'''''||'''''Valve opened'''''||'''''$H_{water}$'''''||'''''$T_{rot}$'''''||'''''$Q$'''''||'''''$R_{curvature}$'''''||'''''$\Delta \rho$'''''||'''''Diaphragme'''''||''''' Flowrate estimated'''''||''''' Type of photo'''''||'''''Height of HS'''''||'''''Heights of Scan and #'''''||'''''Time photo'''''||''''' Dye'''''||'''''Comments'''''||''' Notes'''|| ||||||||$(m)$||$(s)$||$(L min!^{-1})$||$(m)$||$(kg m!^{-3}$||$(mm)$||$H_1,H_2,\Delta t$||VS/HS/Scan||$cm$||$cm$||t1/t2/t3[[BR]]$\Delta t$||yes / no|||||| ||0||test||11092017 __[https://servforge.legi.grenoble-inp.fr/projects/pj-coriolis-17iceshelf/search?q=hh%3Amm hh:mm]__||0.604||50||58.5||0.50||0||13||170,150,41s||VS||-||-||?||yes||Dye did not show up in photos :-(||Elin|| ||1||exp01||12092017[[BR]]!14:38||0.584||50||40.67||0.50||0||12.6||170,150,59s||HS,VS,Scan||55 ||55:-5:30,[[BR]]4||500ms[[BR]](reality: 1000ms)||no||Expl. time = 50 ms too little. Only every second photo was taken||Nadine|| ||2||exp02||12092017[[BR]]!17:02||0.583||50||44.2||0.50||0||12.6||180,150,[1:21.4 1:21.4]min||HS||55?||-||200ms[[BR]](reality: 400ms)||no||Only every second photo was taken||Nadine|| || || ||1||exp01||12092017[[BR]]!14:38||0.584||50||40.67||0.50||0||12.6||170,150,59s||HS,VS,Scan||55||55:[-5:30,[[BR]]4 -5:30, 4]||500ms[[BR]](reality: 1000ms)||no||Expl. time = 50 ms too little. Only every second photo was taken||Nadine|| ||2||exp02||12092017[[BR]]!17:02||0.583||50||44.2||0.50||0||12.6||180,150,81.4s||HS||55?||-||200ms[[BR]](reality: 400ms)||no||Only every second photo was taken||Nadine|| [[BR]] =  = =  = = 0 - Publications, reports from the project = == 2.2 Topography == === 2.2.1 Topography for the shelf break experiments (Nadine) === === 2.2.1 Topography for the shelf break experiments === ''[[Image(Bathymetry_with_Positions.png, 900px)]]'' === 2.2.2 Topography for the ice shelf experiments === == 2.3 Reference axis == === 2.3.1 Reference axis for shelf break experiments (Nadine) === By definition we will use Ox and Oy axis to define the along slope and the cross slope axis. The central reference point (0,0) along the slope is chosen to be the first "land" corner downstream of the source. Positive u - direction corresponds to the along slope flow direction, while positive  v - direction is directed onshelf. === 2.3.1 Reference axis for shelf break experiments === By definition we will use Ox and Oy axis to define the along slope and the cross slope axis. The central reference point (0,0) along the slope is chosen to be the first "land" corner downstream of the source. Positive u - direction corresponds to the along slope flow direction, while positive  v - direction is directed onshelf. The position of the topography relative to this coordinate system is shown in 2.2.1 == 2.3.2 Reference axis for ice front experiments == The  calibration is checked with a calibration ruler (images saved in  CALIB_RULER) to see that the transition between the two cameras is  smooth. For the vertical calibration the images are saved in a different file format with extension '.seq'. The format can be changed in the UVMAT software, but the folder with the vertical images should not be renamed (e.g. '2017-09-08T16.04.32'). To change the image format, choose RUN -> Field Series. Chose the right input file, an select 'extract_rdvision.m', click INPUT and RUN. The image will be saved as a .png file and is ready for use in UVMAT. For the vertical calibration the images are saved in a different file format with extension '.seq'. The format can be changed in the UVMAT software, but the folder with the vertical images should not be renamed (e.g. '2017-09-08T16.04.32'). To change the image format, choose RUN -> Field Series. Chose the right input file, an select 'extract_rdvision.m', click INPUT and RUN. The image will be saved in a new folder as a .png file and is ready for use in UVMAT. == 4.2 Calibration for ice shelf experiments == = 5 - Organization of data files = = 5 - Good to know... = == 5.1 How to turn on and off the lasers == = 6 - Organization of data files = ''All data related to the project are in: \\SERVAUTH4\share\project\coriolis\2016 or \\servauth4.legi.grenoble-inp.fr\share\project\coriolis\2016'' '''Monday 11 September''' The table starts rotating for the first time with a velocity of 50 rounds/ sec. It gets slowly filled with water to a level of 60 cm. This takes about 3h. Before we can start the experiments, the lasers first have to be adjusted. To check how long the water stays in the water, we conduct a little experiments with water (from the tank) that is enriched with particles. After about 2 hours a 4 mm thick clear surface layer develops. The table starts rotating for the first time with a velocity of 50 rounds/ sec. It gets slowly filled with water to a level of 60 cm. This takes about 3h. After filling the tank Thoma measured the water level to be  point where water level does not change with rotation 60.4 cm  Center of tank – 42.5 + 16 cm = 58.5 cm Tank wall (6.5 m) – 62.4 cm. Water temperature 23.3C.