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introduce air to water flow

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Old   March 24, 2011, 10:12
Default introduce air to water flow
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masoud
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hi
I want to know how to introduce air with constant velocity into water flow in one fluid and free surface?
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Old   March 24, 2011, 10:58
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veysel
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hi

i wanna make a nozzle analysis. water goes to air. i dont know how to do.
Can anyone help me to_?
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Old   April 4, 2011, 04:51
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Mohammad Sarfaraz
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Quote:
Originally Posted by masoudarami View Post
hi
I want to know how to introduce air with constant velocity into water flow in one fluid and free surface?
If you are modeeling free srface, like a spillway, you should activate Air Enterainment submodel in the Physics Tab.
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Old   April 4, 2011, 04:52
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Mohammad Sarfaraz
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Quote:
Originally Posted by tekcev View Post
hi

i wanna make a nozzle analysis. water goes to air. i dont know how to do.
Can anyone help me to_?

In this case, you must run the problem as 2 fluid.
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Old   April 5, 2011, 00:19
Default cfd analysis of heat transfer in a tube with inserts
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praveen kumar
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in my case...in fluent after some iterations it is giving floating point error...
what is the floating point error?why it is coming?
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Old   October 2, 2011, 15:09
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behnam
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Quote:
Originally Posted by cheerlapraveenkumar View Post
in my case...in fluent after some iterations it is giving floating point error...
what is the floating point error?why it is coming?
hi,
i see this error when i used some zero value for initializing the model parameter, change this value and if their real value is zero use small value in initializing menu.
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Old   February 19, 2012, 06:31
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hi
do you know in flow 3d how we can use air entrainment in specified sections?in spillways I mean.and also about parameters.specially entrainment rate ceofiecient...I have no idea about it.
thanks
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