very small time step in GMO model

shyam · August 12, 2011, 05:37

Hi,
I am modeling a rotating part (using GMO) at an rpm of 1200 with a viscous material of 10000 cps. I get a time step of 1e-8/1e-9s, while the time step for courant number to be equal to 1 is approx. 1e-3. What are the contributing factors for a very low time step in GMO model? How can I reduce the time step?

MuxaB · December 12, 2011, 00:26

What's the code for the stability limit on the time step? 'vs' or 'cx', 'cy', 'cz'?

August 12, 2011, 05:37	very small time step in GMO model	#1
shyam New Member shyam prasad Join Date: Mar 2009 Posts: 22 Rep Power: 5	Hi, I am modeling a rotating part (using GMO) at an rpm of 1200 with a viscous material of 10000 cps. I get a time step of 1e-8/1e-9s, while the time step for courant number to be equal to 1 is approx. 1e-3. What are the contributing factors for a very low time step in GMO model? How can I reduce the time step?

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December 12, 2011, 00:26		#2
MuxaB Senior Member michael barkhudarov Join Date: Mar 2009 Posts: 314 Rep Power: 6	What's the code for the stability limit on the time step? 'vs' or 'cx', 'cy', 'cz'?