Divergence after change in mass flow rate in two phase flow

meetsunilkale · March 23, 2013, 07:36

Hii...
I am doing simulation of two phase turbulent flow through the pipe. Primary phase is liquid and secondary phase in gas. When problem is initiated calculations are going in proper manner. After few time steps flow get steady.
But when i increase mass flow rate after flow get steady, the problem of turbulent viscosity limited to viscosity ratio of 1.000000e+05 in cells occurs and after few time steps divergence occurs.

How to avoid this problem? How to keep calculations going in proper way.

vasava · March 25, 2013, 04:03

What is/are your outlet condition(s)?

March 23, 2013, 07:36	Divergence after change in mass flow rate in two phase flow	#1
meetsunilkale New Member sunil Join Date: Sep 2012 Posts: 1 Rep Power: 0	Hii... I am doing simulation of two phase turbulent flow through the pipe. Primary phase is liquid and secondary phase in gas. When problem is initiated calculations are going in proper manner. After few time steps flow get steady. But when i increase mass flow rate after flow get steady, the problem of turbulent viscosity limited to viscosity ratio of 1.000000e+05 in cells occurs and after few time steps divergence occurs. How to avoid this problem? How to keep calculations going in proper way. recepky likes this.

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March 25, 2013, 04:03		#2
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 23	What is/are your outlet condition(s)?