oscillating divergence

April 21, 2001, 13:51

Hi,

Im trying to run a free surface simulation of the free surface flow over a cylinder using a combination of MAC and SOLA.

My problem is that my divergence does not decrease beyond a particular value say about 0.019(my criteria for convergence being 0.001) while at the same time the solution doesnt blow up either. It just oscillates around this value.

Could anyone tell me why this is happening please?

T

April 22, 2001, 19:27

It could be rounding errors. Have you tried running in double precision?

April 25, 2001, 09:23

Hi Dean,

What is double precision?

April 21, 2001, 13:51	oscillating divergence	#1
T Guest Posts: n/a	Hi, Im trying to run a free surface simulation of the free surface flow over a cylinder using a combination of MAC and SOLA. My problem is that my divergence does not decrease beyond a particular value say about 0.019(my criteria for convergence being 0.001) while at the same time the solution doesnt blow up either. It just oscillates around this value. Could anyone tell me why this is happening please? T

April 22, 2001, 19:27	Re: oscillating divergence	#2
Dean Guest Posts: n/a	It could be rounding errors. Have you tried running in double precision?

April 25, 2001, 09:23	Re: oscillating divergence	#3
T Guest Posts: n/a	Hi Dean, What is double precision?

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