eng Science and Education Publishing American Journal of Mechanical Engineering 2328-4110 2020-08-28 8 2 69 75 10.12691/ajme-8-2-4 AJME2020824 article Saeed J. Almalowi smalowi@taibahu.edu.sa 1 Mechanical Engineering Department, Taibah University, AlMadinah AlMunwwarah, Saudi Arabia Numerical investigation has been employed using Lattice Boltzmann Model (LBM) to investigate a temporal and a spatial characteristics of the flow past over a single and doubled strainers confined in a channel. A two dimensional nine directional (D2Q9) lattice arrangements is employed. The single and doubled strainers have been considered for Reynolds numbers Re=100. Flow and temperature field of a single and doubled strainers have been predicted. The local and the average Nusselt number have been evaluated for a single and a doubled arrangement of strainers. The results illustrate the effect of the porosity of the strainer on the local and the average Nusselt number. Consequently, a strainer enhances the heat transfer coefficient inside the A/C duct. http://pubs.sciepub.com/ajme/8/2/4/ajme-8-2-4.pdf lattice boltzmann multi-relaxation time regularized Nusselt number strainers