In this work, we propose a new computational model to carry out gas-granular flow dynamics within the framework of the direct simulation Monte-Carlo method. The effect of granular particles in hypersonic flow of argon over a 2D cylinder is investigated. In this computational model, the gas–gas collisions are modeled through regular procedures of the direct simulation Monte-Carlo method. The granular particle is considered as a hard solid sphere undergoing inelastic collisions with gas and granular particles. The granular–granular particle collisions are modeled deterministically while considered dissipative with a finite coefficient of restitution. On the other hand, gas-granular interaction is modeled by the consideration of volumetric forces (drag) exerted by gas on the granular particles. In addition to the drag, the skin friction heating associated with gas-granular interaction is also modeled in the present work. The total loss of collision energy in a cell during dissipative granular–granular and gas-granular interactions is then accommodated as heat locally to the surrounding gas. With the new computational approach in hand, we have tested gas-granular flow dynamics in high speed flow regime. We have brought out the important effects of granular particles on pure gas flow structures, such as shocks, wakes, and flow/surface properties in high speed flows.

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skin friction heating loss of collision energy gasgranular flow dynamics procedures granulargranular particle collisions hard solid sphere pure gas flow dissipative granulargranular and gasgranular interactions computational approach shocks wakes volumetric forces drag 2d cylinder cell restitution flowsurface properties granular particles direct simulation

Rakesh Kumar,Arun Kumar Chinnappan,.Modeling of high speed gas-granular flow over a 2D cylinder in the direct simulation Monte-Carlo framework. 18 (3),.

Rakesh Kumar,Arun Kumar Chinnappan,"Modeling of high speed gas-granular flow over a 2D cylinder in the direct simulation Monte-Carlo framework" 18

Rakesh Kumar,Arun Kumar Chinnappan,"Modeling of high speed gas-granular flow over a 2D cylinder in the direct simulation Monte-Carlo framework"