Turbulence Modeling of Gas Particle Flows

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Department of Chemical Engineering (IIT Delhi) 3 Sept,2015 aAAAugusAugust,2015 B.Tech. Major Project Part-1 / Part-II (CHD 411 / CHD 412) 03 2012CH10930 Meera Gupta Fortnight Report No.: FR1/FR2/FR3/FR4/FR5/FR6 (tick the right one) Date: Student Name: Entry No.: Group No.: DEM-CFD simulations of Mono dispersed and Bi-disperse gas-solid fluidized beds Project Title: Simulation and experimental validation of bubbling –gas-solid fluidized bed using the DEM model. Objectives: In the past week, I have focused on the literature review to understand the application of Discrete Element Model to non spherical shaped particle like cylindrical particle Arranged the access to online documentation of the STAR-CCM software. Got started with STAR-CCM DEM simulation through the CD adapco documentation and have understood all the models available and their applicability to my project The non –spherical particles are designed using spheres of same radius for eg. Cylindrical capsule shaped particles can be made with the help of spheres. The more the number of spheres more the capsule resembles a cylinder but the computational time required is larger in this case. Hence, there is a trade off. Another issue to be looked at is the drag law used for fluidization of non-spherical particles (which will be different from that used by the spherical particles). There are many drag laws in the literature but all of them give different results. Therefore, a proper drag law has to be chosen. The third issue is the particle -particle interaction which changes as the shape changes and the default soft sphere model in STAR-CCM model does not account for the different interactions in this case which will be incorporated through some field functions. A base case for these simulation has been setup accounting for the first two issues. I will run the simulations

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