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Flow in a oscilating tube: nonconservative velocity field 

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November 18, 2011, 10:39 
Flow in a oscilating tube: nonconservative velocity field

#1 
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Vitor Geraldes
Join Date: Dec 2009
Location: Lisbon, Portugal
Posts: 26
Rep Power: 14 
Hi,
I am solving the flow in a 2D oscilating tube in a oscillating noninertial frame of reference. I used the pimpleFoam solver modified to include the Coriolis, Centrifugal and Euler forces. The solver and case study are in attachment. As it can be seen in the attached figure, the velocity near the walls (which are impermeable) is normal to them in some parts. This suggests that the velocity field in nonconservative and the solution is not physically feasible. Does anyone have any clue for this bug? Thanks in advance for the collaboration. Last edited by vitor.geraldes@ist.utl.pt; November 18, 2011 at 10:41. Reason: typo error 

May 28, 2018, 05:29 

#2 
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Dr. Peyman Davvalo Khongar
Join Date: Mar 2018
Location: Helsinki (Finland)
Posts: 16
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Moi!
I know this thread is very old but I write my answer for others that might want to use it. The new versions of OpenFOAM has this possibility that you give linear acceleration, angular velocity and acceleration as tabulated format and OpenFOAM will include those in the fictitious forces in the NS equations. Take a look at the attachment files: (checked with OpenFOAM dev version) 1 You need to put fvOption in your constant folder. Inside it there is a path to your accelerationterms.dat file. 2 in the accelerationterms.dat, you first specify the number of data in acceleration data, linear acceleration, angular velocity and finally angular acceleration. check this for more info: https://github.com/OpenFOAM/OpenFOAM...5900ea5eb546af Then you just run pimpleFoam and the calculated velocity is the relative velocity. Moikka, Peyman 

May 16, 2020, 08:24 

#3  
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Join Date: May 2020
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Quote:
Kind Regards Daniel 

Tags 
boundary conditions, bug, coriolis force, euler force, rotating reference frame 
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