Numerical Simulation Of Fluid Flow And Heat Transfer Of Power-law Fluid In Porous Media

With the increase of energy and environmental issues, reduce energy consumption is promoted worldwide. The research of fluid flow and heat transfer in porous media has important practical significance, since porous media is a effective way to enhance heat transfer and improve the heat transfer efficiency. With the development and application of EOR, the fluid flow and heat transfer studies of power-law fluid of in porous media is imminent. Using the Computational Fluid Dynamics (CFD) method to simulate the temperature field, velocity field, pressure field while power-law fluid flow through porous media, the internal morphology of the flow field can be acquired intuitively and the internal heat transfer can be analyze effectively. At the same time, the experimental expenditure can be reduced, and the study time can be shortened. The influence of Flow and heat transfer characteristicsIn this paper, the commercial software of FLUENT is used to simulate the flow and coupled heat transfer in the complex channel of porous media, and the results are compared with the experiment data. The influence of flow rate, power-law index, structural parameters (such as porosity, particle diameter, reinforcing materials) to the flow and heat transfer characteristics is studied. The results showed that:the flow resistance increases with the increase of flow rate and decreases with the increase of the power law index and porosity. The pressure drop is inversely proportional to the particle diameter, when the porosity is constant. Convective heat transfer coefficient increases with velocity and power-law index, and decreases with porosity and the thermal conductivity of matrix material.In addition, the paper also studied the way to distinguish the state of power-law fluid flow in porous media and the comprehensive heat transfer efficiency which can take both fluid flow and Convective heat transfer into consideration. Critical Reynolds number decreases with the decrease of power-law index, and the comprehensive heat transfer efficiency is proportional to power-law index, particle diameter and porosity.