[masoudarami]

hi
I want to know how to introduce air with constant velocity into water flow in one fluid and free surface?

[tekcev]

hi

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

[mohammad.sarfaraz]

Originally Posted by masoudarami

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.

[mohammad.sarfaraz]

Originally Posted by tekcev

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.

[cheerlapraveenkumar]

in my case...in fluent after some iterations it is giving floating point error...
what is the floating point error?why it is coming?

[Behnam Ghadimi]

Originally Posted by cheerlapraveenkumar

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.

[new anne]

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

[masoud.ravan]

Hi everyone
I want to inject air (with known rate) from bottom of the channel to water flow?
I dont know if Flow3D could simulate this...and also i think airentrainment submodel Pulls air into the water flow due to turbulence
Please help me..
Tanks

[zhouyu3092070]

Originally Posted by masoud.ravan

Hi everyone

I want to inject air (with known rate) from bottom of the channel to water flow?

I dont know if Flow3D could simulate this...and also i think airentrainment submodel Pulls air into the water flow due to turbulence

Please help me..

Tanks

you can try "mass momentum source" to inject air to water

[masoud.ravan]

Originally Posted by zhouyu3092070

you can try "mass momentum source" to inject air to water

Thank you very much
Would you please explain "mass momentum source" more?

[masoud.ravan]

Originally Posted by new anne

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

Hi
This article is like your problem except that they used Ansys FLUENT 15 for their modeling. I wish it could help you.
All the best,
Masoud Ravan
http://www.tandfonline.com/doi/abs/1...nalCode=tjaw20