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Mass Increase for closed system with moving wall |
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January 21, 2009, 15:00 |
Mass Increase for closed system with moving wall
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#1 |
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My issue is with a closed system filled with an ideal gas. It is a 2D axisymmetric model which also includes a moving wall representing a pressure wave generator or piston-cylinder assembly. The problem is the system's mass is steadily increasing. I have tried several variations on modeling the moving wall using various smoothing techniques. I am certain the moving mesh and its UDF is working properly with visual reference, however I believe the code is somehow adding mass on the back stroke.
Any help would be greatly appreciated. Thanks. |
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June 8, 2012, 03:20 |
Coupled Flow _ Rigid Body Motion - Battery Cooling
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#2 |
New Member
Simon
Join Date: Jun 2012
Posts: 4
Rep Power: 14 |
Hello,
I have the same problem. My mass flow rate is alternating increasing up to 700%. The Residuals seems to be ok, but Tke and Tdr pass up quick above 1. |
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April 21, 2015, 15:14 |
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#3 |
Member
sanjeet Limbu
Join Date: Mar 2015
Posts: 91
Rep Power: 11 |
I am getting no pressure and temperature rise for rapid compression in fluid 2D axi-symetric acse
I have entered these values at initialisation Problem is that I am not geting temp and pressure rise during compression stroke |
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