BITS Faculty Publications

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Author: search.filters.author.Sharma, Arvind KumarSubject: search.filters.subject.Chemical Engineering

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    Comprehensive study of fluidization characteristics and variations of moisture content in fluidized bed drying of soybean
    (IOP, 2021) Sharma, Arvind Kumar
    In this exhaustive study, the investigation has been done on the strength of moisture content, air temperature and air entry speed on the drying kinetics and fluidization height during fluidized bed drying of soybean using electric heater as a heating medium. And it is obvious from the observing values, the height of the fluidized bed increased with the increment in inlet Vs and fluidization height decreased with lower inlet Vs. If the mass flow rate reduced, the corresponding height of the bed increased and vice versa for high mass flow rate. Fluidized bed drying was able to reduce drying time in comparison to the fixed bed and hence it could be used to reduce heterogeneity in the bed during drying. In drying kinetics, with the increase in drying parameters, rate constants and diffusivity have also increased.
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    PIV investigation on the effect of gas distributor design for fluidization of Geldart A spherical particles
    (Elsevier, 2024-06) Sande, Priya Christina; Sharma, Arvind Kumar; Mohanta, Hare Krishna
    This is a hydrodynamics study on gas distribution during fluidization of the industrially relevant Geldart A type particles. The impact of 10 different distributor designs comprising perforated distributors (pitch and orifice arrangement pattern varied) and nozzle distributors (nozzle size varied) were studied experimentally on a bench-scale unit. Particle flow homogeneity in air was determined by a novel Particle Image Velocimetry (PIV) analysis of the freeboard velocity field. Over 50 PIV particle phase vector field images are presented and analysed. Bed expansion, Particle attrition with and without fines, velocity profiles with and without fines and effect of fines on bed expansion were ascertained. Best distributor design for a unit such as Fluid Catalytic Cracking (FCC) regenerator and FCC riser were found to be 0.8 cm and 0.6 cm nozzle plates distributors respectively. Confirmation with previous study revealed a correlation between homogeneous distribution of particulate flow and lower number of turbulence zones.