August 22, 2019 at 4:42 amehkhSubscriber
I am intended to use matlab for post processing. However, matlab can not read data files exported from fluent that have the extension of ".dat", but I think it can read HDF5 format.
I am asking Fluent to autosave the data file each 5 time steps but unable to specify the formate of the file to be HDF5. Please advice how this can be changed.
Also, Fluent exported 44 standard variables for each node which take relatively large space and time to export. What I need to export is only 5 variables such as temp, 3 velocities components and density, could you please advice how this can be changed in fluent.
August 22, 2019 at 9:45 amRobAnsys Employee
You can write out ascii data, so could use that.
August 25, 2019 at 3:52 amehkhSubscriber
Thanks for your reply.
can this type of file show data for the whole time steps for each node ? or can I exported automatically each time step?
August 28, 2019 at 12:12 pmRobAnsys Employee
You'd need to export for each step independently. If you add %t to the filename eg output_data_%t.txt Fluent will add the timestep number to the filename to stop you overwriting files.
You can plot/export single point/average data with time to give an xy plot: but depending on what you're doing this may not be suitable.
August 28, 2019 at 12:47 pmehkhSubscriber
Thanks for your reply.
I have hundreds of time steps, which would be inconvenience to export data of each time step manually.
However, What I am trying to plot is the root mean square of temperature versus solution time for a specified line or plane in the domain.
Is there an easier way to do so?
August 28, 2019 at 12:54 pmRobAnsys Employee
If you mean an average temperature v time I'd use the Reports tool and plot the data as you go along. If you have the data already you'll need to read the file, generate the data and then repeat to get a plot. Given the amount of data you have you could skip some as you may only need 10 points for a curve?
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