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-   -   Floating point exception error (https://www.cfd-online.com/Forums/star-ccm/149379-floating-point-exception-error.html)

jsb12136 March 3, 2015 10:51

Floating point exception error
 
Hi,all.
I am trying use Star ccm+ to simulate the rotation of a vertical axis water turbine with 3 blades. The model is regarded as a disk rotating in a stationary region. The results went diverge and "Floating point exception error". I use scalar scene to observe the flow velocity through the disk (which is the region of swept area ). I found that the velocity went sky high at the interface between the disk region and the stationary region. I have tried to change the mesh size, time step, interface boundary conditions, but nothing helps.:(
Please help me to break this ice so I can continue my study.

ggulgulia March 3, 2015 13:24

can you extenuate on the rotation motion method? Is it MRF, RBM or overset method. In case it's Rigid Body Motion (RBM) or Moving Reference Frame (MRF) you need to make sure that you've created the z-axis at the center of the disc

jsb12136 March 3, 2015 14:41

Quote:

Originally Posted by ggulgulia (Post 534214)
can you extenuate on the rotation motion method? Is it MRF, RBM or overset method. In case it's Rigid Body Motion (RBM) or Moving Reference Frame (MRF) you need to make sure that you've created the z-axis at the center of the disc

No, its not rigid body motion. I have created z-axis and its a disk fluid region I made it rotating.


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