. MMwFEM gives an example of "NaN removal" with meshgrid in Matlab. . File->Export->Post Processing. For a single processor calculation a typical command could look like. . If the record fails to export, the event is recorded in the log file that is created by the export program. What I then get is: Export reports of your model from the software. . Use your database's Import/export function to export your data to an csv file. . . In V3.5a, I can define the number of x, y, z points in the 'export postprocesing data' panel as the first figure shows below, it's convenient to import the data to MATLAB for further calculation. . . Il wanna plot these data in Matlab (3d plot). I used a "Model Couplings" Definitions. Exporting COMSOL data into MATLAB. . . 2. run a study. I want to export the temperature of the node with tag pev1 in a .txt file. Most recent answer. run the simulation again and plot it again on figure 1. Here is my .mph as attached. . For more detailed information on how to use COMSOL Multiphysics for import and export of data, see the COMSOL Multiphysics Reference Manual in the installed documentation set. Right-click Sequence and select Results > Export to File. . . A copy of this file is stored in /shared/hpc/sample-job-scripts/comsol/comsol-5.4-sample.sbatch To use it, copy it to your work directory: cp /shared/hpc/sample-job-scripts/comsol/comsol-5.4-sample.sbatch . The model, being simple, runs fine but now I want to compare my model results with experimental data to find the conductivity (depending on the temperature) of the material. For a detailed reference, please see the 'COMSOL Multiphysics MATLAB. . 99 . . Then you can copy/paste or export the table. Then you can schedule an SSIS job. . This means that the I just tried it with a fixed grid on a circular domain, which. format or something so that i dont have to run simulation each time i. . Overview of Data Formats The following table shows the mesh and interpolation data file types that COMSOL Multiphysics can import and . Import external data to compare with results. . Visualize vector quantities in your results. . . . I use the command"comsol batch -inputfile silicon.mph -study std1 " to run it in Linux. I was using COMSOL to simulate how fluid flow is affected by nanostructures. How to export data from COMSOL. to export point data: Derived value>point evaluation>click the point (if it does not exist you'll have to create it under geometry and re-run the model (unfortunately)) and choose the expression to evaluate>evaluate. There should be a way of saving the output data in MATLAB readable. You need to submit your COMSOL jobs through the batch system. fayzmath.buet@gmail . To export the mesh data you have to use the menu for "export fem" as fem will be the structure with all the mesh information. Enter a value for the Alive time (seconds). . Now you need to go on to export and you will be able to select particular domains from your model to export. Send Private Message Flag post as spam. . Overview of Data Formats The following table shows the mesh and interpolation data file types that COMSOL Multiphysics can import and . . . . Running a Model Class-file with the COMSOL Batch Command . Then click the Export button in the Settings window. . . 4 | CONTENTS model.massProp() . Select the COMSOL 5.5 (or any other release you prefer) option and choose COMSOL Batch, as shown below: NOTE: For the example presented in this article (simple fluids heat transfer problem), COMSOL Multiphysics, Single Host was used to set-up the model and create the .mph file. . . bsub [LSF options] comsol batch -inputfile infile.mph -outputfile outfile.mph. . This is simply a result of the structure of the exported data. Fayz-Al-Asad. . The model, being simple, runs fine but now I want to compare my model results with experimental data to find the conductivity (depending on the temperature) of the material. . KNOWLEDGE BASE Set up access to a COMSOL Server installation; BLOG How to Run on Clusters from the COMSOL Desktop Environment; KNOWLEDGE BASE Running parametric sweeps, batch sweeps, and cluster sweeps from the command line; BLOG The Power of the Batch Sweep; FORUM COMSOL batch mode fails to start if comsol.prefs file exsists . Here you need to replace [LSF options] with LSF parameters for the resource requirements of the job. In COMSOL GUI, I need to export the data manually into files. The default is 300 seconds. Chao Zhao . Normally, to export these data into matlab, I must do it "manually": I have to delete all string data in the .txt files: firstly the variable u (line 1-13), then the r-coordinate (line 114-115) and finally z . . This will add a Plot 1 sub-node under the Export node, as shown in Figure 2. . Once the .mph file was created . But I found a solution !!! . . Posted 14 janv. . 2. The default is 0. Waseem Aldeek . . Export Image in COMSOL. . this is simply the easieast way I think. . Hello, I would like to perform an optimization for a COMSOL project file using HEEDS (an external optimization package). I am using COMSOL 4.2a, on a 64-bit windows 7 machine. One way of doing it would be the following: In Comsol, go to Export, add a new . For many of these data types the output doesn't produce a simple 2D table than can easily be imported into all kinds of software. . Change the name of this table to Saved Probe Table. . to take advantage of. instead of run the export directly you just save your export as an SSIS package. . I am solving the "Heat Transfer" and several "Diluted Specie" concentrations. . Whatever it is, there is another way (which works!) The first step is to manually add a probe table by right-clicking on the Table node under Results. (BCP is certainly a good option, but may take you a little while to figure out at the first place.) the high-resolution image is very important and sometimes a compulsory requirement when submitting images for a research article.. Graphic window. 4 | CONTENTS model.geom() . In this blog you will learn how you can export high-resolution images from comsol multiphysics. . 3. export data. In the Export to File Settings window, for the Run option, select Animation 1. To solve using the Sequence, right-click and select Run. export, and native COMSOL formats. Select the Use graphics check box when the batch process should run results nodes that create graphical contents such as exporting to file. The file below is an sbatch script. . . BatchFeatureList. Visualize field distributions in your results. . . . The only difficulty in this is actually Matlab, as it needs (X,Y,Z) data in a specific format in order to plot it. I want to run a parametric sweep and export a specie inventory vs time for each parameter in the sweep. However I found some difficulty to export the data in this file. . The output.xml and .log files will be created. . BatchFeature. The problem is that the txt exported file is empty and it only contains the header data such as. . I am using comsol without GUI in a Linux system. So the first step is to run your simulation and set up your graphical window so whatever you see in the graphical window will . Enter the Number of job restarts. . Rep Power: 0. Comsol/Batch. . . I think that the only export format that is easy to . 1. to accept an input file of parameters. . Bangladesh University of Engineering and Technology. Import text data from Comsol. Probably, I badly explained. 98 To export the data behind the curves, right-click Global 1 plot sub-node and select Add Plot Data to Export. . I therefore run a parametric sweep with different conductivity values and export (plot export) the temperature at specific points to an .txt file. For UNIX, from the command prompt, execute the export command: ./export.sh -u <user name/password> -d <database name> -c <criteria file name> -o <output file name>. 98 . . To do that I need to be able to run a a script (in either Matlab or Batch) which allow COMSOL. Display results in cross sections. We will soon let the batch sweep machinery write the data for the Accumulated Probe table here. The Model Object In the COMSOL Java API you access models through the model object, which contains all algorithms and data structures for a COMSOL model. 2016, 15:03 UTC5 Interfacing, Geometry, Structural Mechanics & Thermal Stresses Version 5.2 3 Replies . . get (java.lang.String tag) Returns a batch job. I have a data (.txt file) which is exported from Comsol. The only way is to plot first run in figure 1 ,change the parameter. Learn how to export results data from COMSOL Multiphysics. . generates NaNs when the grid point is outside the domain. . . . . . . void. I therefore run a parametric sweep with different conductivity values and export (plot export) the temperature at specific points to an .txt file. Then, after computing, I plotted a 1D Global plot. Md. . If possible, please give me the Tecplot 2019 or above in my e-mail. 2011, 14:53 UTC8 Version 4.0a 1 Reply . In the Settings window, click Browse this defines the location and name of the file. Please login with a confirmed email address before reporting spam. . . In this example, the file name and path is C:\COMSOL\myfile.mph. . . create (java.lang.String tag, java.lang.String type) Creates a batch job. . . . . . . I have tried finding discussions online, however, I cannot seem to find a solution. I have a similar question about exporting data into a file while sweep parameters in COMSOL model through Matlab livelink. . . . Show results using colored lines or surfaces. . . 4 | CONTENTS model.form() . . . . In this simple example with just one node under Export, we could here just as well have left the default option All. For each type of data you can export from Comsol there are a choice of the format to export into. to export point data: Derived value>point evaluation>click the point (if it does not exist you'll have to create it under geometry and re-run the model (unfortunately)) and choose the expression to evaluate>evaluate. . Please login with a confirmed email address before reporting spam Hi there, I am new to COMSOL and currently running a very basic . I set the parameter V2 , for instance in a for loop in a Matlab function by " model.param.set('V2',V2); then run the study by "model.sol('sol1').run;" . You can also use the Results - Derived Variables to make tables and export these, or make plots and export the plot or the plot data, depending on which snode/sub node you select for applying the command. The COMSOL Desktop also uses the model object to represent your model. . Posted 22 fvr. . For more detailed information on how to use COMSOL Multiphysics for import and export of data, see the COMSOL Multiphysics Reference Manual in the installed documentation set. Show results on different geometric entity levels. . . most export commands make an entry in the Export node, whre you can define file name, format, grid distribution, interpoaltion functins etc -- is a GUI utiltiy for extracting data from your solution to a. data file. What I then get is: A splash window will open. . For example, "fem.mesh" contains the mesh and "fem.mesh.p" contains all points of the mesh. . To run these operations, select the Sequence node and click Run. . What command should I type? . . . Running the simulation in batch mode on the cluster is then fairly straightforward. export, and native COMSOL formats. . . Then you can copy/paste or export the table. . . This is the maximum number of times the job can be restarted if it fails to complete. Writing Data to File After Solving in COMSOL Multiphysics The library model that we started from already has one defined derived value. . . So what you need to do is you need to select the object and then select build all objects so what it will do is, it will build only the objects inside your geometry. You can see this under Results > Derived Values > Global Evaluation. comsol batch runs comsol For multiple cpus (parallel), make sure the number of processors you request in the directives (top) part of the script is equal to the number you specify in the -np part of the comsol batch line Part 2: Submit Job and Check Status Make sure you're in the dir that contains the PBS Script . Results. . Whatever it is, there is another way (which works!) . . Exporting Geometry to File 196 . feature () Returns the tasks of a batch job. . In this case the Exported Data txt file contains all the data (header + x,y points). Export data as .csv or .dat Posted 8 mag 2013, 08:29 GMT-7 Computational Fluid Dynamics (CFD), Results & Visualization Version 4.3 1 Reply Hooman Send Private Message Flag post as spam. 26th Mar, 2022. . But in V4.1, I only can define the node points for Lagrange elements of order to define the location (second figure shows), and the exported data is . .