|May 31, 2012, 08:01||
Comparing Unscaled Continuity Residual with an appropriate scale
Join Date: May 2012
Posts: 39Rep Power: 5
In FLUENT User Guide, in the section of "Judging Convergence", it is mentioned that:
If you make a good initial guess of the flow field, the initial continuity residual may be very small leading to a large scaled residual for the continuity equation. In such a situation it is useful to examine the unscaled residual and compare it with an appropriate scale, such as the mass flow rate at the inlet.Is there anybody who could help me understand what it means by examining the unscaled residual and comparing it with an appropriate scale, such as the mass flow rate at the inlet?
For instance, in my case that I am simulating with FLUENT:
unscaled continuity residual = 0.005,
mass flow rate at inlet = 0.024068371 kg/s,
mass flow rate at outlet = 0.024068366 kg/s,
net flux imbalance of mass flow rate = 5e-9.
Last edited by sagila; June 3, 2012 at 05:50.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Extrusion with OpenFoam problem No. Iterations 0||Lord Kelvin||OpenFOAM Running, Solving & CFD||8||March 28, 2016 11:08|
|How to write k and epsilon before the abnormal end||xiuying||OpenFOAM Running, Solving & CFD||8||August 27, 2013 15:33|
|High Courant Number @ icoFoam||Artex85||OpenFOAM Running, Solving & CFD||9||January 3, 2012 09:06|
|Orifice Plate with a fully developed flow - Problems with convergence||jonmec||OpenFOAM Running, Solving & CFD||3||July 28, 2011 05:24|
|Could anybody help me see this error and give help||liugx212||OpenFOAM Running, Solving & CFD||3||January 4, 2006 19:07|