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HIgh viscosity - convergence issues

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Old   February 12, 2014, 08:57
Default HIgh viscosity - convergence issues
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Rams Manu
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I am running a simple flow through a pipe. The pipe has flowing water and oil trapped beneath. I am using VOF explicit scheme with CICSAM.

When I run for oil viscosity comparable to water the number of iterations required per time step to converge (to 1e-6) is just 1 or 2 iterations.

But when I increase the oil viscosity, the residuals does not reach 1e-6 even if have 100 iterations/time step.

My courant number is around 0.2 and Re around 0.5

Is there anything that can be done to improve the convergence ?

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convergence issues, high viscosity

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