CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Surface inejction- steady state - mass flow rate

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

LinkBack Thread Tools Search this Thread Display Modes
Old   January 25, 2012, 13:40
Question Surface inejction- steady state - mass flow rate
New Member
CFD-student's Avatar
Join Date: Dec 2011
Location: Sweden
Posts: 13
Rep Power: 14
CFD-student is on a distinguished road

This is the first time i am using the DPM model in Fluent. I have some questions regarding the injection type: "surface injection". My simulation is a 1-way coupled steady state simulation where i resolve the flow field first and then carry out the trajectory calculation decoupled with the flow field. I have created a surface for injecting particles such that i go a uniform distribution of injections points.

What I wonder is the following:

1. How is the number of particles/parcel determined in this steady state simulation? Is it only 1 particle/parcel or is the total mass flow rate in some way distributed over the injected parcels?

2. In this kind of decoupled simulation where the particles dont affect the flow field or each other in any way is there any meaning to the concept solids volume fraction?

3. In general when fluid and solids have the same velocity is ok to estimate the solids volume fraction from the projected area of all particles in a injection zone divided by the injection zone surface area? Is it a better idea to calculate the volume occupied by particles as the mass flow rate multiplied by the residence time and divided by particle density in a given volume divided by the volume of that space?
CFD-student is offline   Reply With Quote


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
CFX turbo - Mass flow rate Vashishth Patel CFX 7 April 3, 2014 20:33
Mass flow rate sepidecent CFX 0 August 9, 2011 00:15
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
Surface Integral - Mass Flow Rate Venkatesh V FLUENT 3 October 10, 2008 16:18
mass flow rate on the Iso-clip surface & interior Sunil Gupta FLUENT 0 April 22, 2008 09:29

All times are GMT -4. The time now is 17:16.