Som,

You can model the growth kinetics using a UDF in Fluent Ansys.

Find attached a review paper related to this subject.

Regards

Dear Dr. Mounir Bouaifi

Thank you so much for your suggestions.

I am working on "Computational Investigations of Irradiance for Photo-bioreactor for Exploration of Algal Growth". I have completed the effect of bubble formation and irradiance in 2 D flat plate Photo-bioreactor.

I started reading about UDF in Fluent Ansys. Is is feasible to understand and work in UDF for this topic with in next 3-4 months ? I am unfamiliar with UDF in Fluent Ansys as my core field is Biotechnology.

Hi Som,

It should be possible, although having some programming experience in C helps. UDFs are typically quite compact routines, and basic examples of different UDFs are well documented in the ANSYS help files; it also contains some background on C in order to make you avoid the important pitfalls, considering type declaration and termination of expressions for example. With that, basic UDFs such as a rate equation are quite straightforward to implement.

Dear Dr. Cees Haringa

Thank you so much. I found this very helpful.

Hello Som,

You can find two UDFs for ANSYS Fluent to describe the substrate consumption and biomass production based on a Monod kinetic enclosed. The UDFs are to be used in conjunction with the species transport model where at least two species (biomass&substrate) are defined. This can also be combined with Euler-Euler multiphase models, but some modifications would be required then.

In the case of algae fermentation, I assume that you should couple the biomass growth rate to the light intensity instead of substrate concentration, but the example should give you a good idea about the general concept.

Hope this helps.

Stephan