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Bioventing 3D model using CFX

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Old   June 25, 2019, 19:46
Default Bioventing 3D model using CFX
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Mohammad khodabakhshi
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Hello, I am working on a project (see below) and I need to make sure that CFX module is capable of modelling my system, please help me go through it.
The system we are going to simulate has been described below:

A cylindrical reactor filled by contaminated soil including one/some venting well(s) is going to be simulated; the venting well induces gas flow through the cylindrical reactor, which contains hydrocarbons-contaminated soil. The radial air flow comes from the outer radius and flows toward the extraction well(s) in the center of the reactor.

In order to identify the governing mass transfer processes, a three-dimensional numerical model is going to be developed. We are going to use a software that incorporates multi-phase flow, multi-component transport and non-equilibrium transient mass transfer. The mass transfer mainly occurs between the following phases: aqueous and non-aqueous phase liquid (NAPL) phases to vapor phase; NAPL phase to aqueous phase and aqueous phase to solid phase. In the meanwhile, a biodegradation reaction occurs in the reactor which is considered a first order reaction, so biodegradation rate correlation should be also applied to the model.

If you need any other details on model please let me know.
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Old   June 25, 2019, 23:32
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CFX can do all this, but it is not trivial. You have several complex models which will be coupled together, so you can assume this model will take considerable work before it is working accurately.

But before you start on this you should be absolutely clear what you are trying to achieve and that CFD is the best way to achieve it. If you are just trying to identify the governing mass transfer processes, than can a simple analytical model be close enough? Then you will have the answer this afternoon rather than in several months time.
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