Which solver suits for liquid (!) incompressible pipe flow?

simpson · January 26, 2012, 09:27

Hi all,

I need your help in finding the right solver for my Bachelor thesis. In the simulation should show the propagation and reflection of pressure waves in a pipe. Therefore I think I needed a compressible solver.
The fluid should be water. My problem is that all compressible solvers I can find in OpenFOAM (v. 1.7.1) work with perfect gas equations.
Does anyone know a fitting solver or if it is possible to use the solvers with assumption of perfect gas under certain conditions?

I´m looking forward to recieving your answeres

alberto · January 27, 2012, 10:21

For transonic and supersonic liquids there is ~/OpenFOAM/OpenFOAM-2.1.x/applications/solvers/compressible/sonicFoam/sonicLiquidFoam

There is an example application in the programmer's guide (Decompression of a tank).

simpson · February 11, 2012, 13:02

Hi alberto,

Thanks a lot! this solver really fits

I´m fighting now with setting an inital flow profile due to undesired pressure waves at that time. But this is an other topic.

Greetings

simpson · February 12, 2012, 11:24

I just read in the description of the solver, that it is for trans-sonic/supersonic, laminar flow of a compressible liquid.
Does it mean the liquid should flow with transonic speed or is it possible that the fluid flows far below sonic speed (0.2 m/s) but observes pressure waves with sonic speed?

January 26, 2012, 09:27	Which solver suits for liquid (!) incompressible pipe flow?	#1
simpson New Member Stefan Wilhelm Join Date: Jan 2012 Posts: 4 Rep Power: 3	Hi all, I need your help in finding the right solver for my Bachelor thesis. In the simulation should show the propagation and reflection of pressure waves in a pipe. Therefore I think I needed a compressible solver. The fluid should be water. My problem is that all compressible solvers I can find in OpenFOAM (v. 1.7.1) work with perfect gas equations. Does anyone know a fitting solver or if it is possible to use the solvers with assumption of perfect gas under certain conditions? I´m looking forward to recieving your answeres

January 27, 2012, 10:21		#2
alberto Senior Member Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,878 Rep Power: 23	For transonic and supersonic liquids there is ~/OpenFOAM/OpenFOAM-2.1.x/applications/solvers/compressible/sonicFoam/sonicLiquidFoam There is an example application in the programmer's guide (Decompression of a tank). __________________ Alberto GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as live DVD/USB, hard drive image and virtual image. GeekoCFD 32bit - The 32bit edition of GeekoCFD. GeekoCFD text mode - A smaller version of GeekoCFD, text-mode only, with only OpenFOAM. Available in a variety of virtual formats.

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February 11, 2012, 13:02		#3
simpson New Member Stefan Wilhelm Join Date: Jan 2012 Posts: 4 Rep Power: 3	Hi alberto, Thanks a lot! this solver really fits I´m fighting now with setting an inital flow profile due to undesired pressure waves at that time. But this is an other topic. Greetings

February 12, 2012, 11:24		#4
simpson New Member Stefan Wilhelm Join Date: Jan 2012 Posts: 4 Rep Power: 3	I just read in the description of the solver, that it is for trans-sonic/supersonic, laminar flow of a compressible liquid. Does it mean the liquid should flow with transonic speed or is it possible that the fluid flows far below sonic speed (0.2 m/s) but observes pressure waves with sonic speed?