[OpenFOAM] Visualization of a 3D Flow field (paraview)

Chris123 · November 7, 2018, 06:51

Hi,
I simulate a velocity flow over a hill. How can I visualize the overflow in 3D, so that mean for all heights of my terrain while seeing the ground (hill).

yambanshee · November 13, 2018, 03:33

A good way is to make use of streamlines.

in paraView:

-load up the internal mesh, the ground patch you want to display, and the inlet patch

-hit cntl+space and type extract block, and extract the ground patch

-cntrl+space and extract block again, but this time select your inlet patch

-now make your ground patch the only visible zone in paraview

-(optional) cntrl+space and type mask points. Select the extracted block that is your inlet face, set the 'maximum number of points' to whatever you want and click the random sampling tick box. The number you specify in the number of points is how many stream lines will be generated

-finally, cntrl+space and type stream tracer with custom source. For the input select the internal mesh, and for the source select the inlet extracted block or the mask points, and hit apply

An alternative to streamlines is to make use of glyphs. Once again, you'd want to use extract blocks to extract the ground patch, and then make gliphs using the internal mesh

Chris123 · November 27, 2018, 09:51

Hi Thank you for your help, and sorry for my late reply.
I have some difficuilty to follow your steps.
If I want to apply the stream tracer with customer source filter, I have just to choose my case bullit, the extracted Block1 (ground) and the extracted Block 2 (inlet).
how can I select the internal Mesh as input?

Sorry for my inconvenience.

November 7, 2018, 06:51	Visualization of a 3D Flow field (paraview)	#1
Chris123 Member Chris Schäfer Join Date: Apr 2017 Posts: 34 Rep Power: 9	Hi, I simulate a velocity flow over a hill. How can I visualize the overflow in 3D, so that mean for all heights of my terrain while seeing the ground (hill).

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November 13, 2018, 03:33		#2
yambanshee Senior Member Zander Meiring Join Date: Jul 2018 Posts: 125 Rep Power: 8	A good way is to make use of streamlines. in paraView: -load up the internal mesh, the ground patch you want to display, and the inlet patch -hit cntl+space and type extract block, and extract the ground patch -cntrl+space and extract block again, but this time select your inlet patch -now make your ground patch the only visible zone in paraview -(optional) cntrl+space and type mask points. Select the extracted block that is your inlet face, set the 'maximum number of points' to whatever you want and click the random sampling tick box. The number you specify in the number of points is how many stream lines will be generated -finally, cntrl+space and type stream tracer with custom source. For the input select the internal mesh, and for the source select the inlet extracted block or the mask points, and hit apply An alternative to streamlines is to make use of glyphs. Once again, you'd want to use extract blocks to extract the ground patch, and then make gliphs using the internal mesh

November 27, 2018, 09:51		#3
Chris123 Member Chris Schäfer Join Date: Apr 2017 Posts: 34 Rep Power: 9	Hi Thank you for your help, and sorry for my late reply. I have some difficuilty to follow your steps. If I want to apply the stream tracer with customer source filter, I have just to choose my case bullit, the extracted Block1 (ground) and the extracted Block 2 (inlet). how can I select the internal Mesh as input? Sorry for my inconvenience.