CFD Online Logo CFD Online URL
Home > Forums > Fluent Multiphase

Cfd of water-air flow in ejector in fluent

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   October 13, 2013, 13:05
Default Cfd of water-air flow in ejector in fluent
New Member
Join Date: May 2013
Posts: 2
Rep Power: 0
ARI7862 is on a distinguished road
Hi all,

I am a postgraduate student and am struggling very badly to get a converged solution through pressure inlet- pressure outlet B.C.

I am trying to simulate the horizontal flow of water (primary phase) and air (secondary phase) in an ejector. My geometry has two inlets (inlet 1: through which high pressure water is supplied, inlet 2: through which air at atmospheric pressure is entrained) and 1 outlet, which is open to atmosphere. I am doing a 2d axi-symmetric, steady state simulation in FLUENT.

B.C are as follows:
Inlet 1: velocity inlet (water velocity 2m/s, air velocity=0, air volume fraction=0)
Inlet 2: pressure inlet (gauge pressure of mixture=0 pascal, volume fraction of air=1)
outlet: pressure outlet (gauge pressure of mixture=0 pascal)

I am using pressure based solver, algebric slip mixture model, standard k-e turbulence model with standard wall functions and 5% turbulence, pressure-velocity coupling SIMPLE and URF's of pressure, momentum are 0.2 and for slip, vol. fraction,TKE, TDR =0.1.

i am using a structured mesh with 53000 nodes having minimum orthogonal quality of 0.77 and max. aspect ratio of 4.9.

I am facing convergence problem. my solution is diverging. please help me out in solving this problem with pressure inlet (air) and outlet B.C's.

CFD experts please help me, its very urgent:

reply me at:

Thanx in advance...
ARI7862 is offline   Reply With Quote


2 phase flow, 2d axisymmetric., ejector, fluent13, water-air

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
introduce air to water flow masoudarami FLOW-3D 10 September 13, 2016 09:15
Coupled DPM water spray inside enclosed volume of air dan86 FLUENT 0 July 19, 2013 11:23
CFD for air flow analysis in a room bidalufias Main CFD Forum 1 May 12, 2011 19:11
Simulation of steam (CO2 and Water vapor mixture) flow through nozzle using Fluent. Jimmy FLUENT 0 March 2, 2011 13:30
air bubble is disappear increasing time using vof xujjun CFX 9 June 9, 2009 07:59

All times are GMT -4. The time now is 06:01.