Abstract
An adsorption model for fluid flow, heat, and mass transfer of the adsorbent bed was established. Based on the single relaxation time lattice Boltzmann method, a dual-distributed lattice Boltzmann model of density and concentration was established to solve the fluid flow and mass transfer process in the surface area of the adsorbent bed. The adsorption and heat transfer process on the surface of the adsorbent bed was incorporated into the dual-distributed lattice Boltzmann model by the fourth-order Runge-Kutta finite difference method. The multiphysics fields under Poiseuille flow were simulated by the presented model, and the adsorption capacity and temperature distribution during the adsorption process were investigated.
Highlights
As a storage medium for gases such as H2 and CH4, porous media adsorbents have been widely used in the engineering industry [1]
As an emerging and effective numerical simulation method at the mesoscopic level, LBM has been widely used in fluid flow, heat, and mass transfer problems, such as porous media flow, due to its advantages of simple programming, inherent parallelism, and easy handling of complex boundaries [2]
Effect of Fluid Flow and Mass Transfer The simulation conditions are 120 K temperature and 0.1 MPa pressure, while the left inlet velocity satisfies the Poiseuille flow with a maximum velocity of 0.01, and the inlet methane concentration is maintained at 10
Summary
As a storage medium for gases such as H2 and CH4, porous media adsorbents have been widely used in the engineering industry [1]. The adsorption of gases such as methane occurs on the surface of porous media while giving off heat, and it is necessary to study the heat transfer process in the area near the adsorption bed during the adsorption process and the effect on the adsorption amount. As an emerging and effective numerical simulation method at the mesoscopic level, LBM has been widely used in fluid flow, heat, and mass transfer problems, such as porous media flow, due to its advantages of simple programming, inherent parallelism, and easy handling of complex boundaries [2]. The heat of adsorption effect, was few incorporated in LB simulations for adsorption. A two-dimensional adsorption and heat transfer model is established based on LBM, and a Maxsorb adsorption bed of a specific size is selected for numerical simulation. The kinetic adsorption characteristics are investigated combining the heat of adsorption effect
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