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Transport of concentrated species - will the species change the flow field ?

Posted 29.08.2012, 03:27 GMT-4 Chemical Reaction Engineering Version 5.1 4 Replies

Wei Chen
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Dear everyone,
I am working on one simulation about membrane separation, and I am using "Laminar Flow" together with "Transport of concentrated species". I have one question, will the flux (gas A) from the membrane boundary change the flow field (also gas B) from "Laminar Flow" ?
Thanks a lot!
wei chen
4 Replies Last Post 14.10.2015, 13:05 GMT-4
Nagi Elabbasi Facebook Reality Labs
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Posted: 1 decade ago 29.08.2012, 11:56 GMT-4
Dear Wei,

Yes the gas flux can change the laminar flow field if it changes either the fluid density or viscosity. Make sure you set the fluid properties in the Laminar Flow physics to the appropriate values from the Concentrated Species.

Nagi Elabbasi
Veryst Engineering
Dear Wei, Yes the gas flux can change the laminar flow field if it changes either the fluid density or viscosity. Make sure you set the fluid properties in the Laminar Flow physics to the appropriate values from the Concentrated Species. Nagi Elabbasi Veryst Engineering
Steven Chiuta
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Posted: 1 decade ago 23.10.2012, 04:18 GMT-4
Hello everyone,

Is there a protocol for choosing the mass constraint when implementing tansport of concentrated species physics? I would reckon choosing the excess reactant as mass constraint. But what if you have only one reactant with 2 products, how do you then choose the mass constraint?

Steve.
Hello everyone, Is there a protocol for choosing the mass constraint when implementing tansport of concentrated species physics? I would reckon choosing the excess reactant as mass constraint. But what if you have only one reactant with 2 products, how do you then choose the mass constraint? Steve.
Yuhong Chen
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Posted: 9 years ago 01.06.2015, 23:58 GMT-4

Hello everyone,

Is there a protocol for choosing the mass constraint when implementing tansport of concentrated species physics? I would reckon choosing the excess reactant as mass constraint. But what if you have only one reactant with 2 products, how do you then choose the mass constraint?

Steve.


Hi Steve,

Have you solved your problem?It seems that I get the same confusion.I set 2 species in concentrated species phsics, but one BC should be set with flux for each species respectively which cannot be done if I choose the mass constraint.

looking forward to your reply.

thanks in advance.
[QUOTE] Hello everyone, Is there a protocol for choosing the mass constraint when implementing tansport of concentrated species physics? I would reckon choosing the excess reactant as mass constraint. But what if you have only one reactant with 2 products, how do you then choose the mass constraint? Steve. [/QUOTE] Hi Steve, Have you solved your problem?It seems that I get the same confusion.I set 2 species in concentrated species phsics, but one BC should be set with flux for each species respectively which cannot be done if I choose the mass constraint. looking forward to your reply. thanks in advance.
Nikolaj Andersen
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Posted: 9 years ago 14.10.2015, 13:05 GMT-4
Hi Yuhong.

Have you found a solution to your problem? Because I'm in the same pickel with my electrochemical cell, where I have two species, which needs to be specified at separate boundaries?
Hi Yuhong. Have you found a solution to your problem? Because I'm in the same pickel with my electrochemical cell, where I have two species, which needs to be specified at separate boundaries?

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