How to superimpose two velocity fields?

viktormu · November 19, 2017, 20:45

Hello
I would like to superimpose two fields from two simulations.
The simulations are as follows:
1) In first one I establish a turbulent wind to form the realistic atmospheric boundary layer over the ground surface
2) In the second one I have two tip vortices near the ground.

I need to superimpose the flow fields from these two simulations. How to do that in OF? I would really appreciate your help

ayushmorx · November 21, 2017, 04:47

what do you mean superimpose? If postproc, you can easily get it done in ParaFoam.

Assuming you meant interpolation of one field onto another grid, you can use the mapFields utility.

RobertHB · November 21, 2017, 10:48

Hello victor,
do i understand correctly that you have simulation a) with a turbulent wind, simulation b) with two specific vortices and want to combine those in simulation c)?
In this case mapFields might not be the solution for you, as it overwrites the existing field. This works fine for e.g. copiyng your data onto a finer grid, but the field from sim b) would overwrite the data from sim a).
Maybe you could use setFields to define the vortices at their precise prositions, but i'm unsure how to the that.

November 19, 2017, 20:45	How to superimpose two velocity fields?	#1
viktormu New Member viktor Join Date: Nov 2017 Posts: 1 Rep Power: 0	Hello I would like to superimpose two fields from two simulations. The simulations are as follows: 1) In first one I establish a turbulent wind to form the realistic atmospheric boundary layer over the ground surface 2) In the second one I have two tip vortices near the ground. I need to superimpose the flow fields from these two simulations. How to do that in OF? I would really appreciate your help

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November 21, 2017, 04:47		#2
ayushmorx New Member Ayush Agrawal Join Date: Jun 2014 Posts: 16 Rep Power: 12	what do you mean superimpose? If postproc, you can easily get it done in ParaFoam. Assuming you meant interpolation of one field onto another grid, you can use the mapFields utility.

November 21, 2017, 10:48		#3
RobertHB Senior Member Robert Join Date: May 2015 Location: Bremen, GER Posts: 292 Rep Power: 12	Hello victor, do i understand correctly that you have simulation a) with a turbulent wind, simulation b) with two specific vortices and want to combine those in simulation c)? In this case mapFields might not be the solution for you, as it overwrites the existing field. This works fine for e.g. copiyng your data onto a finer grid, but the field from sim b) would overwrite the data from sim a). Maybe you could use setFields to define the vortices at their precise prositions, but i'm unsure how to the that.