Hydrofoil Cavitation

Richy · July 9, 2014, 05:09

Hi

I am modelling a hydrofoil in a cavitating flow. I know from other data that the flow cavitates. However, if I run the model in steady state (without cavitation model) and then once convergence has been achieved and I change to transient analysis and engage the cavitation model the flow does not cavitate. But if I start with the transient analysis the flow cavitates but unrealistically so. Half the domain has a fractional phase change, which is wildly incorrect.

Any thoughts??

me3840 · July 9, 2014, 18:58

It sounds like your transient case isn't converging.

July 9, 2014, 05:09	Hydrofoil Cavitation	#1
Richy New Member Jay Rich Join Date: Feb 2013 Posts: 13 Rep Power: 13	Hi I am modelling a hydrofoil in a cavitating flow. I know from other data that the flow cavitates. However, if I run the model in steady state (without cavitation model) and then once convergence has been achieved and I change to transient analysis and engage the cavitation model the flow does not cavitate. But if I start with the transient analysis the flow cavitates but unrealistically so. Half the domain has a fractional phase change, which is wildly incorrect. Any thoughts??

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July 9, 2014, 18:58		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	It sounds like your transient case isn't converging.