Toby Devlin

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About Toby Devlin

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    TUFLOW-FV user
  • Birthday 07/22/92

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  • Gender Male
  • Location Brisbane
  • Interests Music, food, answering forum posts

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Toby Devlin's Activity

  1. Toby Devlin added a post in a topic rain temperature   

    Hi Ale,
    The bc default will be set to NaN. You can specify bc default == 20, etc. If you wish to apply a constant value.
    However, builds from 2014.01.024 onward will take the surface water temperature when the model finds NaN for precipitation temperature.
    Toby
  2. Toby Devlin added a post in a topic Can't add HDF5 file metatdata   

    Hi Rohan,
    Most likely the output path name either has a typo in it, or not all of the folders have been created yet. Double check that the path exists exactly as specified in the error log.
  3. Toby Devlin added a post in a topic Duplicate grid labels are not permitted   

    Hi Rohan,
    The error is most likely to you having two (or more) BCs specified on grids, but the grids have been given the same name. Double check the names of the grids you have specified and make sure they are all unique.
     
  4. Toby Devlin added a post in a topic 1D culvert model question   

    Hi Keith,
    There are also alternative update options for cell-centered bathymetry such as polylines and polygons. These are all specified in the TUFLOWFV manual section 4.2.2
    Toby
  5. Toby Devlin added a post in a topic 1D culvert model question   

    Hi Keith,
    You are correct that the elevations of the model may need to be changed. The extreme case is when the cells adjacent to the culvert are so high as to not get wet at all, then there can be no flow through the structure. Even if they are wet however, the flow will be limited as the culvert appears cut off by the bathymetry.
    Have you specified the mesh elevations within the .2dm file or through a separate cell-centered csv?
    If you have specified through the .2dm, keep in mind that as TUFLOWFV is cell-centered, the true elevation internal to the model will be interpolated from the mesh vertices to the centroid of each cell. This can make things difficult in situations such as yours when attempting to control that cell without changing others.
    If not, then it should be a simple method to adjust the elevation of the relevant cells to be equal to or less than the culvert invert, and not affect any other cells.
     
  6. Toby Devlin added a post in a topic Setting ICs for tracer levels   

    Hi PHA,
    It seems what you are most likely looking for is an 'initial condition 2D' specification.
    Initial condition 2D == my_initial_2d_file.csv
    Where the csv has a header line that is ID, TRACE_1, and corresponding values below.
    The first column is the cell ids, you don't need all of them, just the ones that you wish to change, though you can specify all if you wish, and the second column is the tracer concentration you want to initialise the model with, ie. 100.  You can also use these files to set the water level (WL) current velocity (U, V), salinity (SAL), temperature (TEMP) and any other tracers you are modelling (TRACE_2, TRACE_3, etc) if you wish.
    We are also working on improving our BCs with FC_POLY boundaries, allowing users to have scalar inflows over all the cells within a user-specified polygon.
  7. Toby Devlin added a post in a topic how to define weir boundary   

    Hi Lei,
    Thanks for posting. There are a few options to fixing your problem. The key is that the model by default will extrapolate internal water levels into the 'ghost cells' downstream of your weir. This means that the weir has the same water level either side causing complications.
    There are three options to force the model to do what you want.
    1. You can add extra cells downstream of your weir and set a water level boundary around those cells to ensure they are always lower than your weir crest.
    2. You can just add a water level boundary to the same nodestring as your weir is on. This is the same as solution 1 except the water level boundary will apply to the ghost cells so you cannot extract results from the ghost cells to confirm, though it doesn't require changing your mesh.
    3. Instead of a weir structure you can specify an HQ bc boundary on your nodestring. HQ bcs require a comma delimited file of water levels and corresponding flow rates (make sure that you use negative flows for outflows). You can specify a range of water levels H and then use flows specified by Q = CBhd2/3  where hd is the height of water above your weir crest, not necessarily the same as the H column. The model will then interpolate the flows linearly between the water levels that you choose. ie. for a 100m wide channel with a weir crest at -2m and a weir coefficient of 1.
    H,Q
    -2,0
    -1.98,-7.368062997
    -1.96,-11.69607095
    -1.94,-15.32618865
    -1.92,-18.56635533
    -1.9,-21.5443469
    -1.88,-24.32880798
    -1.86,-26.961995
    -1.84,-29.47225199
    -1.82,-31.87975708
     
  8. Toby Devlin added a post in a topic unable to open file:../output/ _H.dat   

    Hi Lei,
    without seeing your control file i would assume that the directory ../output/  may not exist?
    TuflowFV assumes that to be the default output directory, if you wish to have the output written to a different location then please use the command
    output dir == /my/output/directory/
    If this isnt your problem, then I will need to see your control file.
  9. Toby Devlin added a post in a topic how to run fuflow-fv in Linux system   

    Hi Welcome to the forum,
     
    There is an existing post for installation of TuflowFv on a linux system:

    If you are referring to the process of actually running the software, you can call the command with the control file as the argument,
    ie.
    user@linuxmachine: ~> /home/software/tuflowfv/trunk/platform/linux_ifort/tuflowfv  my_control_file.fvc
    or if you have used a link to shortcut the command
    user@linuxmachine: ~>    tuflowfv  my_control_file.fvc
     
  10. Toby Devlin added a post in a topic No result at some elements   

    This problem can often be caused by the IDs column in you cell-centres file being inconsistent with the actual IDs of the elements in the 2dm.
    The upcoming release of TUFLOWFV will have a bathymetry from TIN option. This allows users to save their bathymetry set as an SMS .TIN file, and TUFLOWFV will do the interpolation and bathymetry inspection internally
  11. Toby Devlin added a post in a topic Merging the triangles during mesh generation   

    Hi Hamid,
    I have not come across this issue that I can recall, and I am using version 11.2.8 currently. Can you please post a screen grab of what this looks like before and after the change?
    Toby
  12. Toby Devlin added a topic in Errors   

    Nodestring segment error
    Sometimes in the initialisation of a model you may come across this error:
    ERROR:fvdomain_construct:fvinitout:fvout_construct:process_nodestring:Nodestring 1, segment 1 does not correspond to any model face.
     
    This is caused when TUFLOWFV has found a nodestring between two nodes that do not also have a face between them.
    If you have created the nodestring within SMS then you may find that you have not held down the shift key while creating your nodestring (will automatically include all the nodes between the two that you click), if you dont do this then sms only includes the first node you clicked, and the second node you clicked in the nodestring.
     
    If you created an external nodestring through TUFLOWFV and you have had this error returned check whether or not you need to have the boundary flag then  try adding more waypoints as a first start, if this fails to work please post here or contact TUFLOWFV support.
     
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  13. Toby Devlin added a post in a topic Version   

    Please Note that users of MATLAB 2014b may experience issues due to changes to MATLAB's graphics setup. Please post any issues here.
  14. Toby Devlin added a topic in MatLab   

    Expression input for multiple models
    The expression tool can be taken even further.
    If you want to input some function that requires input from two separate model runs, this can be achieved with a simple specifier.
    First you need to input a cell array of model files in the modfil input, the order of this is important.
    Then, (for example if we were comparing water level between two runs with different bathymetery), we specify our variables with M1. or M2. beforehand.
    eg.
    'M1.H - M2.H'   will subtract the water level of the second model in the model cell array from the water level of the first model.
     
    This has the same limitations of normal expressions, therefore at this stage it is not possible to do these comparisons on models with different numbers of cells.
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  15. Toby Devlin added a topic in MatLab   

    Patch Properties
    FVG objects construct a matlab patch object for the actual image that is presented on screen. Each face of the patch object represents the cells of the model, and the corners of these faces represent the vertices.
    The handle to this patch object is stored as a property of the fvg objects, which allow us to customize various aspects of the visualisation.
    Just a few of the options for this:
    If you want to apply a slight transparency to the entire mesh equally, you can edit the patch object's facealpha property.
    sheet1 = fvgsheet(fobj, modfil) patchhandle = sheet1.PatchObj; set( patchhandle , 'FaceAlpha', 0.5) This sets all the faces of the patch to be 50% transparent.
     
    Be careful when setting these patch properties as some of them will be updated by moving the slider bar, and all your hard work will be erased.
    for more info on patches and their properties, see MathWorks documentation on patches.
    http://www.mathworks.com.au/help/matlab/ref/patch.html
    http://www.mathworks.com.au/help/matlab/ref/patch_props.html
     
     
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