{"id":46299,"date":"2020-07-20T00:05:43","date_gmt":"2020-07-20T00:05:43","guid":{"rendered":"\/forum\/forums\/topic\/multiphase-steam-jet-pump-ejector-mixture-model\/"},"modified":"2020-07-20T00:05:43","modified_gmt":"2020-07-20T00:05:43","slug":"multiphase-steam-jet-pump-ejector-mixture-model","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/multiphase-steam-jet-pump-ejector-mixture-model\/","title":{"rendered":"multiphase steam jet pump (ejector) (mixture model)"},"content":{"rendered":"

Dear All <\/p>\n

<\/p>\n

I’m trying to apply a multiphase model (mixture model) on an ejector ( as a steam jet pump). so I am trying to validate a paper about this topic. where, <\/strong>
<\/span><\/span>1.<\/strong>The primary fluid (water) with flow rate Q0 and high-pressure P0 is accelerated through nozzle and obtained subsonic speed results in a low-pressure PS (vacuum) at the outlet section of the nozzle.
2.<\/strong>The secondary fluid (air, with flow rate QS) is entrained and accelerated into the mixing chamber.<\/p>\n

<\/p>\n

 <\/p>\n

<\/p>\n

Note#1: 
<\/strong>Paper title: Numerical study on mixing flow behavior in gas-liquid ejector
https:\/\/doi.org\/10.1007\/s42757-020-0069-z <\/p>\n

<\/p>\n

I applied all Bc’s from that paper, Which are: <\/span><\/span><\/strong><\/p>\n

<\/p>\n

1.Mixture model –noslip velocity –implicit-without phase interactions
2.Steady state
3.axi-symmetric
4.Air-water (mixture)
5.K-e model (turbulence)
6.V water =3m\/s …………..nozzle
7.V air=3m\/s  …………….domain
8.Outlet= atm pressure
9.Methods= coupled
10.Default properties for materials (water and air)    <\/p>\n

<\/p>\n

The problem is: <\/strong>
There is a problem with the behavior of water when I get the volume fraction results. as you see in fig (A1 to A5)<\/strong> the water flow like a transient behavior ( 200 iterations is different from 400 iterations and so on). <\/p>\n

<\/p>\n

Note#2: I applied steady-state, not transient <\/strong><\/p>\n

<\/p>\n

I think I need to apply phase interactions between water and air. but I don’t know what is good interaction between them that I should apply to get the volume fraction as the paper (figure \"B)\".<\/strong>

may you help me to solve this problem?<\/p>\n

<\/p>\n

Regards, <\/p>\n

<\/p>\n

Thanks a lot<\/p>\n

<\/p>\n

\"My<\/p>\n

<\/p>\n

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