instability problem for very low reynolds number range
 

Hi, I am looking for best spatial discretization scheme for following dimensionless parameters:

Re: 6.0E-5 - 0.6 Pr: 5.0E+7 - 1.5E+4 Pe: 3.0E+3 - 2.5E+3 Ra: 25E+1 - 3.0E+5

These are valid for very high viscous flows at high temperature range(1200K-1700K).

My aim is to solve instability problem encountered with different viscosity values.

Thank you for your time and considerations.

Nuray

Re: instability problem for very low reynolds number range
 

Hello Nuray,

Perhaps the Pracht's method be very good. See the following paper:

Pracht,W.E.,1971. A numerical method for calculating

transient creep flows. J.Comp.Physics

7, 46-60.

Good Luck for you.