In　this　paper,　numerical　simulations　have　been　performed　to　discuss　the　variations　of　temperature　field　and　particle-average　Nusselt　number　of　nine　porous　particles　based　on　the　lattice　Boltzmann　method.　Uniform　and　random　spatial　distribution　were　considered.　For　multiple　porous　particles,　there　is　heat　transfer　between　fluid　and　front　particles　when　fluid　flow　through　the　particles　and　therefore　the　fluid　temperature　rises　which　will　suppress　the　heat　transfer　efficiency　of　the　particles　behind.　As　inter-particle　distance　increases,　the　suppression　of　the　front　particles　decreases　and　therefore　particle-average　Nusselt　number　increases.　However,　the　effects　of　the　distance　gradually　decrease　as　distance　increases.　Besides,　the　distance　change　in　the　direction　vertical　to　the　inflow　direction　has　more　obvious　influences　on　the　temperature　field　and　particle-average　Nusselt　number.　Furthermore,　Darcy　number　has　two　opposite　influences　on　the　heat　transfer　efficiency　between　the　behind　particles　and　fluid.　For　a　specific　random　spatial　distribution,　the　particle-average　Nusselt　number　is　in　an　increase　with　the　increase　of　Darcy　number　which　is　similar　to　that　for　a　uniform　spatial　distribution.　©　2022　American　Chemical　Society.