Hi guys, I used lesInterFoam
I used lesInterFoam to simulate flow around a wedge.
My boundary conditions are as follows:
Top and bottom boundaries are SYMMETRY
Left boundary is INLET
Right boundary is OUTLET
wedge boundary is WALL
I choose gamma=1 for both internal field and inlet value to disable the 2nd phase.
Uinlet=100 m/s poutlet=1.0e5 pas
But after solution the pressure is negative.
If the flow can be approximate
If the flow can be approximated as being incompressible, then I don't see anything wrong with the pressure being negative as only the pressure difference drives the flow.
Is the velocity field unphysical?
Hi Madhavan, thanks for your
thanks for your reply
How can i make this negative pressure to possitive values.
I want to implement a cavitation model and must have possitive pressure.
thanks in advance
I forgot to mention it. I sol
I forgot to mention it.
I solved this case with oodles that is an incompressible solver, but there was no negative pressure.
Perhaps by modifying the posit
Perhaps by modifying the position and/or the value of reference pressure in the lesInterFoam code. I think, the following line in pEqn.H does that:
Check it out.
Alternately, an easier way would be to add a sufficiently large quantity to the entire phase pressure field after each time-step and calling this new variable something else (say pve_pd) and using this in your model. Bear in mind that I know nothing about cavitation modeling and I could very well be misleading you here. Please wait for a more experienced user to comment.
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