|
[Sponsors] |
April 9, 2017, 13:52 |
Plot 3D Flow past obstacle
|
#1 |
New Member
Join Date: Jul 2015
Posts: 7
Rep Power: 10 |
Good morning,
I'm looking for a nice looking/'impressive' way to visualise 3D fluid development past an obstacle from 3D sumilation done using time-dependent Navier-Stokes. I am more or less familiar with paraview only. I've seen nice looking plots using Q-criterion, but never used it myself. What data (velocity vectors? or velocity gradients etc?) do I need to do Q-criterion plot? Is there a another way to visualize in 3D? Reynolds number is up to 100. Thank you very much. |
|
April 15, 2017, 12:56 |
|
#2 |
Super Moderator
Alex
Join Date: Jun 2012
Location: Germany
Posts: 3,399
Rep Power: 46 |
Isosurfaces of the Q-criterium always "look nice", especially when colored with the flow velocity.
Same thing applies to the vorticity magnitude (if there is enough vorticity in the flow of course). There is more than one way to do this in ParaView. One of them starts with a fluid velocity vector result. Apply the filter "gradient of unstructured dataset" on this result. In the properties panel of this filter, you can choose to compute vorticity an Q-criterion. Then apply a "contour" filter and choose a suitable iso-value. You will have to play around a bit with the value. Color the iso-surface e.g. with the velocity magnitude and animate. 720p_iso_vorticity.0050.png 720p_iso_vorticity.0100.png 720p_iso_vorticity.0300.jpg 720p_iso_vorticity.0600.jpg 720p_iso_vorticity.0900.jpg |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Flow past a 2D cylinder - High Re (1E+05) - Cd too high | Pervispasco | OpenFOAM Running, Solving & CFD | 4 | March 14, 2022 02:19 |
Problem with results of simulation of flow past sphere at Re=250 | quarkz | Main CFD Forum | 2 | December 30, 2011 06:31 |
How to Plot Mass Flow Rate w.r.t No. of Iterations | Julie | FLUENT | 2 | July 30, 2002 10:50 |
simulating separated flow past the airfoil | Yusoff | CFX | 7 | January 16, 2001 19:19 |
fluid flow fundas | ram | Main CFD Forum | 5 | June 17, 2000 21:31 |