Abstract
Numerical study of forced convection heat transfer from arrays of prolate particles is performed using the second-order Immersed Boundary-Lattice Boltzmann Method (IB-LBM). Prolate particle is studied with aspect ratio of 2.5 with solid volume fraction variation from 0.1 to 0.3. For each solid volume fraction, arrays of prolate particles are generated and simulations have been performed to calculate Nusselt number for four different Hermans orientation factors and various Reynolds numbers. From the simulation results, it has been observed that, for any specific value of Hermans orientation factor, Nusselt number increases with the increase of the Reynolds number and solid volume fraction. More importantly, it is found that the effect of orientations on Nusselt number is significant. Nusselt number correlation is developed for ellipsoidal particles as function of Reynolds number, Prandtl number, solid volume fraction, and orientation factors. This correlation is valid for 0.1 ≤ c ≤ 0.3 and 0 < Re ≤ 100 .
Highlights
Fluid flow and its interaction with solid particles is an essential phenomenon, which has immense applications in the domain of various industries, for example, in pneumatic conveying system, drying of food items, combustion of coal, fluidized bed, waste recycling, and pharmaceutical product formation
Numerical simulations are performed for various Hermans orientation factors
Close observation shows that the impact of S on Stanton number decreases with the increase of Reynolds number. e trend observed at other solid volume fractions is similar to that reported at c 0.2 and is omitted
Summary
Fluid flow and its interaction with solid particles is an essential phenomenon, which has immense applications in the domain of various industries, for example, in pneumatic conveying system, drying of food items, combustion of coal, fluidized bed, waste recycling, and pharmaceutical product formation. Heat transfer of these gas-solid flows is a significant phenomenon that needs to be investigated. Particles present in biomass process acquire different orientations. In the present research, a new parameter of S is found, which has strong effects on the Nu. e present research aims to study such systems of particles; it will be an important contribution in the field of gas-solid flows
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