CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

Mass flow absorption

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 22, 2005, 21:50
Default Mass flow absorption
  #1
Roberto
Guest
 
Posts: n/a
Dear all, I would like to understand the meaning of "mass flow absorption". I am working in a industrial gas turbine compressor stage, and I am looking for the particle tracking of the water inside the compressor. I would like to find out the particle impacting area along the compressor blade. Could the wall interaction be useful for ths analysis?

Thanks for your help

Roberto
  Reply With Quote

Old   June 23, 2005, 19:31
Default Re: Mass flow absorption
  #2
Glenn Horrocks
Guest
 
Posts: n/a
Hi Roberto,

I am confused as to what you are trying to do. Particle tracking is for tracking particles (obviously), not water. If the fluid in your compressor is just water then you have no need for particle tracking. The forces on the blades are calculated from the pressure and viscous effects.

Alternately, are you modelling flow with particles to determine how many particles impact the blades?

Glenn Horrocks
  Reply With Quote

Old   June 24, 2005, 09:53
Default Re: Mass flow absorption
  #3
Roberto
Guest
 
Posts: n/a
Dear Glen, my study concerns with the simulation of the water particle tracking, when water is injected in an industrial gas turbine in order to wash the blades. The main flow is air, and then I set injection of water. In quantifying the amount of water needed to wash the dust off from the blade, I am going to find out from the simulation the areas where particles impact with the the blades.

After a look to the tutorials, and I think particle tracking is the best solution matching my requirements.

I have already found out the trajectories of the water inside the compressor and now I need to investigate where the particles impact against the blade.

Thanks for your help

I am looking to receiving an asnswer to you.

Roberto
  Reply With Quote

Old   June 26, 2005, 19:14
Default Re: Mass flow absorption
  #4
Glenn Horrocks
Guest
 
Posts: n/a
Hi,

I understand now. Particle tracking sounds like a good way of simulating your model. I don't do much particle modelling, but doesn't CFX-Post show you the impact density of the droplets? That is the number of impacts per unit area - this sounds like what you want.

Glenn Horrocks
  Reply With Quote

Old   June 27, 2005, 11:31
Default Re: Mass flow absorption
  #5
Roberto
Guest
 
Posts: n/a
Hi Glenn,

I didn't find any impact density of the droplets in the CFX_Post. The only think related with this topic could be the "Water Volume fraction", but actually I am not sure.. I did it but the results are not realistic.

I read the manual and the are some options called "wall interaction" but you can get into only using "Particle User Routine" (Fortran Routine).

Do you think this is resonable?

Thanks for the help

Roberto Chiurchi
  Reply With Quote

Reply

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
mass flow rate error Masood FLUENT 0 May 22, 2005 00:32
different mass flow rates michael FLUENT 4 February 21, 2005 04:48
Mass flow rate Neser CFX 4 February 14, 2004 01:27
Determine mass flow rate along flow path Atit Koonsrisuk CFX 2 October 5, 2003 04:47
Mass Flow Inlet Pravir Kumar Rai FLUENT 0 February 17, 2003 20:23


All times are GMT -4. The time now is 11:38.