Error: Floating point error: overflow

sezar · April 25, 2013, 02:40

Hi everyone
I have a question
i am simulation two phase flow at fluent
air=primary phase----------water liquid=secondary phase
air velocity=10m/s &water velocity=1m/s
i am use the schiller naumann for drag
and slip velocity i am use manninen - et-al
but when i am run simulation This message is appear
((Error: Floating point error: overflow))
can some one help me ?

oj.bulmer · April 25, 2013, 04:25

Are you sure about the phases are not other way around, ie Water being primary and air being secondary?

OJ

sezar · April 25, 2013, 05:35

hi
i am sure
air carried water droplet toward filter
air= primary phase=i am sure

vasava · April 25, 2013, 05:51

There can be several reasons for the floating point error. If your case is transient than try reducing the time step. A relatively bigger time-step can be the reason behind this error.

I hope you have fine mesh else that could also be another problem.

April 25, 2013, 02:40	Error: Floating point error: overflow	#1
sezar New Member Join Date: Apr 2013 Posts: 8 Rep Power: 12	Hi everyone I have a question i am simulation two phase flow at fluent air=primary phase----------water liquid=secondary phase air velocity=10m/s &water velocity=1m/s i am use the schiller naumann for drag and slip velocity i am use manninen - et-al but when i am run simulation This message is appear ((Error: Floating point error: overflow)) can some one help me ?

April 25, 2013, 05:35	Error: Floating point error: overflow	#3
sezar New Member Join Date: Apr 2013 Posts: 8 Rep Power: 12	hi i am sure air carried water droplet toward filter air= primary phase=i am sure

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April 25, 2013, 04:25		#2
oj.bulmer Senior Member OJ Join Date: Apr 2012 Location: United Kindom Posts: 473 Rep Power: 20	Are you sure about the phases are not other way around, ie Water being primary and air being secondary? OJ

April 25, 2013, 05:51		#4
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 22	There can be several reasons for the floating point error. If your case is transient than try reducing the time step. A relatively bigger time-step can be the reason behind this error. I hope you have fine mesh else that could also be another problem.