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-   -   emergent! hot to simulate mcvd process ? (http://www.cfd-online.com/Forums/fluent/29303-emergent-hot-simulate-mcvd-process.html)

stone January 30, 2002 22:52

emergent! hot to simulate mcvd process ?
 
hot to simulate the reaction: SiCl4(g)+O2(g)-->SiO2(s)+2Cl2(g) in fluent,how to carry out it!

stone January 31, 2002 04:18

Re: emergent! hot to simulate mcvd process ?
 
the reaction take placed in gas phase. how to simulate it? plz tell me.

stone January 31, 2002 04:34

Re: emergent! hot to simulate mcvd process ?
 
the reaction as following:

--------------------ĄŁ-ĄŁ-----------

-----> o

SiCl4+O2 -----> o SiO2 particle

-----> o ĄŁ ĄŁ

------------------------------------

Greg Perkins January 31, 2002 18:33

Re: emergent! hot to simulate mcvd process ?
 
Look in manual under surface reactions. Have a look at some of the tutorials.

Greg

stone February 4, 2002 10:02

Re: emergent! how to simulate mcvd process ?
 
thank your message, but the reaction takes place in gas phase, which is volumetic reaction not a surface reaction. the particls,sio2, generated in gas, the the particle deposits on the surface due to the thermophosis force. in fluent, what to do for the chemical reaction with particle model. in the side, there are some paper for mcvd, but how to carry out it?

Greg Perkins February 4, 2002 20:35

Re: emergent! how to simulate mcvd process ?
 
OK, well I don't know your process, but here's how I normally approach such problems:

1) write down the governing equations, bcs for your problem

2) compare them with Fluent and its models

3) if same use inbuilt Fluent models

4) if different use udfs and/or uds scalars to transform Fluent so it solves eqns (1). In some cases, you can't transform Fluent to solve (1) due to Fluent's limitations, in that case you need to change your problem deifinition (1) or use another code.

So you're problem involves small particles/molecules of solid being formed in the gas phase and then transported to the wall?! Depending upon how much detail you want/need to model, I imagine you can transform his into a surface problem. To actually model the transport of material from the gas phase to the wall could be difficult in Fluent. Ask Fluent more about it.

Greg


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