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-   -   water spray in hot air (http://www.cfd-online.com/Forums/fluent/44683-water-spray-hot-air.html)

krish May 12, 2007 23:17

water spray in hot air
 
Hi, I would like to analyze cooling of hot air using high pressurized water spray. The water droplets are supposed to evaporate inside the duct. Can anyone please help me out, how to set the model. or if there is any related documents (tut file) regarding that in fluent. Thanks in advance.

K

Prasad Dudhgaonkar May 22, 2007 14:36

Re: water spray in hot air
 
I hope you got the answer already. If not, you can use pressure-swirl atmizer or single orifice atomizer in discrete phase model or whichever best suits your need. Select DROPLET (amongst INERT, DROPLET and COMBUSTING). You can follow tutorial "Modeling Evaporating Liquid Spray".

- Prasad

krish May 23, 2007 00:55

Re: water spray in hot air
 
hi prasad, thanks for your reply. my problem is still hanging. i tried to follow liquid spray model, but most probably i am not able to set the material properly as i need water air mixture. after doing a trial solve following the above mentined tut, i didn't get the liquid spray at all. i don't know eher i am doin the mistake. also the temperature effect is not playing any role. the energy eqn residual shows very less value compared to others. i m doubtful whether my model is considering the energy effect properly or not. as my problem has a significant role on energy equation, air temp is 500 deg C, water droplets are at low temp(of the order of room temp but at high pressure). can i send you my specific requirement so that u can put yr valuable suggestions on it? plz reply. thanks again. regards, krish

Prasad Dudhgaonkar May 23, 2007 05:40

Re: water spray in hot air
 
Please send.

jpinho August 10, 2009 12:06

hi there..
i am studying same case and i dont know what i am doing wrong.
can you sent to me any case file?
thanks ins advance
jpinho

niket shah March 13, 2012 02:57

Hey, I am doing the same kind of work. I am able to set the water-air mixture as a material property for species but I am having trouble for DPM mass convergence. Can anyone help me on this issue and I am getting good convergence for energy. I don't whether I am doing any mistake while specifying the material properties. As seen from the above post that Prasad and Kirsh have already done these kind of work...so please help me guys..... I would appreciate you in advance for that.

afarnoud April 3, 2013 08:58

Quote:

Originally Posted by niket shah (Post 349066)
Hey, I am doing the same kind of work. I am able to set the water-air mixture as a material property for species but I am having trouble for DPM mass convergence. Can anyone help me on this issue and I am getting good convergence for energy. I don't whether I am doing any mistake while specifying the material properties. As seen from the above post that Prasad and Kirsh have already done these kind of work...so please help me guys..... I would appreciate you in advance for that.

hey, I am doing the same simulation. But I think I have some mistakes in modeling the solution panel. Can anyone help me. Thank you in advance.


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