Chemistry ODE Solver in reactingFoam

Cyberholmes · July 13, 2011, 10:31

I was just wondering about the meanings of the settings in the edoCoeffs dictionary:

odeCoeffs
{
solver SIBS;
eps 0.05;
scale 1;
}

'solver' I know chooses between different methods (RK, KRR4, and SIBS are the only three I know of that OpenFOAM can use). However, I don't know what 'eps' and 'scale' are used for here. Any help?

Thank you.

mturcios777 · July 13, 2011, 13:59

eps is the tolerance for convergence (the difference between successive timesteps before you accepts the answer) and scale is a multiplication factor for the time stepping (which can speed up convergence depending on your ODE.

July 13, 2011, 10:31	Chemistry ODE Solver in reactingFoam	#1
Cyberholmes New Member Join Date: Jun 2011 Posts: 29 Rep Power: 14	I was just wondering about the meanings of the settings in the edoCoeffs dictionary: odeCoeffs { solver SIBS; eps 0.05; scale 1; } 'solver' I know chooses between different methods (RK, KRR4, and SIBS are the only three I know of that OpenFOAM can use). However, I don't know what 'eps' and 'scale' are used for here. Any help? Thank you.

July 13, 2011, 13:59		#2
mturcios777 Senior Member Marco A. Turcios Join Date: Mar 2009 Location: Vancouver, BC, Canada Posts: 740 Rep Power: 28	eps is the tolerance for convergence (the difference between successive timesteps before you accepts the answer) and scale is a multiplication factor for the time stepping (which can speed up convergence depending on your ODE. ayhan515, lx882211 and arvindpj like this.

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