Particle Size Effects on Dynamic Behavior of Heated Spheroidal Particles in Shear Flow

This work investigates the dynamics of prolate particles suspended in shear flows through four‐way direct numerical simulations, considering both isothermal and non‐isothermal. To achieve this, we adopt a hybrid numerical framework that integrates the lattice Boltzmann method, a finite‐difference scheme, the immersed boundary method, and the discrete element method. The analysis focuses on how heat transfer and particle size influence particle dynamic motion and rotational behavior, including the evolution toward the final equilibrium state, the characteristics of that equilibrium, rotational velocity, and orientation‐induced oscillations. The findings show that the confinement ratio, defined as the particle's major radius relative to the channel width, strongly governs both the time required for a particle to reach equilibrium and the vertical position of that equilibrium, as well as the particle's rotational speed and its oscillation around the equilibrium position.