Eleonora,

The short answer to your question is "Yes."

The follow-up question is "How does one get PV to do it."

First, ParaView can read one or more datum sets, one or more times, and each datum set can have a different format. PV can then display any combination of datum sets in any number of windows (until your RAM has been filled). 

I am not sure I understand what you expect in the final display, but I will assume that you want to create some kind of side-by-side display. Let's start with a simple case.

I will assume you have results from two different simulations using the same mesh in each simulation, D1 & D2. The results from D1 is to be used for y>0.0, and the results from D2 is to be used for y<0.0

Read in D1; add PV filter CLIP; select 'Y Normal' and click on Apply. (If the displayed D1 data is for y<0, mark the check box 'Inside Out' and select Apply again.)

Read in D2; add the PV filter Clip; select Y Normal' and click on Apply with the opposite side designated in the 'Inside Out' box.

At this stage you should have a side-by-side display of the two objects -- "half" of object D1 above y=0 and "half" of object D2 below y=0.

If your datum sets are very large relative to the capacity of your workstation, you can use PV's Slice filter in place of the PV's Clip filter.

As a further step you can animate the Clipp/Slice plane to have the cutting plane move from front to back. At this point you should consult the PV manual found here

http://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v4.3&type=data&os=all&downloadFile=TheParaViewGuide-v4.3-CC-Edition.pdf

Samuel W Key
FMA Development, LLC
1005 39th Ave NE
Great Falls, Montana 59404
USA




On 3/15/2015 10:04 AM, Eleonora Piersanti wrote:
Hi all,
I have two .vtk files with two velocity fields. I would like to select the upper part (y>0) from one file and the lower part from the other one and then to merge them. Is it possible to do this?
Thank you,
E.


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