Supercritical　water　fluidized　bed　reactor,　where　supercritical　water　serves　as　a　fluidizing　agent,　is　viewed　as　a　promising　way　in　hydrogen　production.　Water　in　cold　jet　experiences　great　physical　fluctuations　through　injection　under　supercritical　pressure.　Severe　temperature　changes　easily　result　in　heterogeneous　flow　structures　when　cold　jet　injects　entraining　particles　into　the　reactor.　This　paper　develops　an　EMMS/energy　model　based　on　the　energy-minimization　multi　-scale　principles　where　energy　balance　equations　are　added.　The　effects　of　temperature　on　drag　force　due　to　simultaneous　change　of　water　density　and　viscosity　are　investigated.　Validation　is　clone　with　this　new　drag　model　incorporated　into　the　Euler-Euler　Two-Fluid　model.　Results　show　that　temperature　increase　improves　heterogeneous　flow　structure,　especially　in　particles　-dilute　flow.　EMMS/energy　model　can　capture　particle　acceleration　by　thermal　expansion　of　water　in　cold　jet,　which　is　responsible　for　clusters　of　particles.　2020　Elsevier　B.V.　All　rights　reserved.