CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent Multiphase

Mixing simulation issue in Euler-Euler gas-liquid dispersed flow

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 1, 2020, 01:24
Default Mixing simulation issue in Euler-Euler gas-liquid dispersed flow
  #1
New Member
 
SAYANTAN BISWAS
Join Date: Mar 2018
Location: Mumbai
Posts: 16
Rep Power: 4
Sayantan Biswas is on a distinguished road
Hello Everyone,



I'm currently working on passive tracer mixing simulation in air-water system using transient Euler-Euler method. Consider a vessel (an image is attached), water is patched up to a certain height (water domain) and above that air is present (air domain), multiple nozzles are arranged at the bottom of vessel through which air is coming and enhancing the mixing. The flow field (suitable drag model, lift force & turbulent dispersion force) are in reasonably good agreement with experiment (time averaged distribution as well as flow dynamics/ local fluctuation).



Once the flow is established, I'm enabling species transport model and performing passive mixing simulation i.e. no reaction is involved. The tracer material property is exactly same as water, constant mass diffusion co-efficient is considered as 9.1e-9 m2/s. A small region in the water domain at the central zone (few mm below the air-water interface) is patched with tracer mass fraction 1.

Mixture-Template, mixture density: volume weighted mixing law, mixture viscosity is constant as water, mass diffusivity: Multi-component.



As the simulation progress, I'm observing tracer is being distributed to air domain as well (i.e. going above the air-water interface level), also I'm monitoring volume integral of tracer mass fraction over the entire numerical domain, the amount is continuously increasing with time.



How do I make sure, the tracer gets distributed only in water phase and mass of tracer is conserved?


TIA
Attached Images
File Type: jpg mix_snap.jpg (51.6 KB, 8 views)
Sayantan Biswas is offline   Reply With Quote

Reply

Tags
#eulereuler #multiphase

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
simulation of immiscible liquid liquid two phase flow in a channel Marosh CFX 1 January 13, 2019 16:53
NX advanced flow simulation - jet stream boundary mesh issue henry_cfd_questions Siemens 0 March 20, 2018 23:21
Continuous mixing flow simulation in a Tank Meca_Ali FLUENT 7 March 14, 2018 05:50
Simulation fails after adding multi-component gas ConorH STAR-CCM+ 3 January 20, 2017 09:50
simulation of mixing flow willams Main CFD Forum 6 October 18, 1999 00:46


All times are GMT -4. The time now is 05:07.