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

simulation of plasma field

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 13, 2005, 02:41
Default simulation of plasma field
  #1
Ralf Schmidt
Guest
 
Posts: n/a
Hi,

at the moment I am thinking about the simulation of a gas flow (air) through a plasma field. Has anyone experience with this kind of simulation? Is it possible in Fluent /Gambit to model?

What about the air leaving the plasma field, it might be ozone or O3... are there material data available in the fluent data base for that medium??

Thanks for your help in advanced! Ralf

  Reply With Quote

Old   September 13, 2005, 12:44
Default Re: simulation of plasma field
  #2
Razvan
Guest
 
Posts: n/a
As much as I know,

PLASMA = ionized gas (cold or hot)

so you can easily create a plasma field, you got the positive ions (and negative where exist) for all major gases in materials panel. All you have to do then is choose a specific composition and temperature for it.

For the start, I think you can try PDF model, using air as "fuel". It is the most elegant solution (you don't have to provide a reaction mechanism) but I can't guarantee it would be quite correct !!

I can't think of anything else right now.

Best wishes, Razvan
  Reply With Quote

Old   September 14, 2005, 03:14
Default Re: simulation of plasma field
  #3
Ralf Schmidt
Guest
 
Posts: n/a
Hi,

thanks for your response, but I am not so sure, what u mean with a PDF model... How does it work and what are the boundary conditions to be used in this model?

Ralf
  Reply With Quote

Old   September 14, 2005, 13:44
Default Re: simulation of plasma field
  #4
Razvan
Guest
 
Posts: n/a
When I said PDF model, I meant non-premixed combustion model (the one that uses PDF functions to determine composition for a particular mixture in specific conditions of reactant concentration and temperature, instead of reaction mechanism). This model is based on the assumption "mixed-is-burned", which means that reaction speed is infinite and composition is completely controlled by turbulent mixing of reactants (this is quite valid for fast burning species).

Now, if your plasma is hot, then there will occure some reactions between plasma and air, of course depending on plasma composition. The ions in plasma field are very reactive chemical species (if I'm not wrong!), so reaction kinetics will be very fast, allowing you to use this PDF-based model.

For setting up and boundary conditions you will find everything you need in doc files.

Best wishes, Razvan
  Reply With Quote

Old   September 14, 2005, 20:50
Default Re: simulation of plasma field
  #5
Mike Marcu
Guest
 
Posts: n/a
Dear Razvan

I'm trying to simulate the heat transfer from an unltraviolet lamp . The inside of the lamp is plasma - a mixture of Argon and Mercury at cca 0.1 torr but having the mind boggling temperature of 5000K.

I need the thermal properties of this plasma- the density, the Cp, the conduction coefficient etc -for conduction I found something like

Lambda= ro x Cp x a where ro is the density, Cp is the specific heat at constant pressure and a is the thermo difussivity but I was unable to go further.

Please help if you can.

con best regardi Mike Marcu
  Reply With Quote

Old   September 15, 2005, 03:44
Default Re: simulation of plasma field
  #6
Razvan
Guest
 
Posts: n/a
I will be working on this. Just have a little patience, OK?

Razvan
  Reply With Quote

Old   September 15, 2005, 13:25
Default Re: simulation of plasma field
  #7
Mike Marcu
Guest
 
Posts: n/a
Thank You
  Reply With Quote

Reply


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
3D Simulation of the Plasma Jet in FLUENT Steve FLUENT 9 April 20, 2012 07:42
FSI TWO-WAY SIMULATION Smagmon CFX 1 March 6, 2009 14:24
Overflow problem in steady simulation ReeKo CFX 11 October 8, 2008 18:57
Fire simulation using FDS from NIST Jens Main CFD Forum 1 January 22, 2004 02:53
3-D Contaminant Dispersal Simulation Apple L S Chan Main CFD Forum 1 December 23, 1998 11:06


All times are GMT -4. The time now is 04:14.