Liquid　evaporation　from　nanopores　has　been　more　recent　with　progress　in　nanotechnology.　The　relevant　application　ranges　from　solar-driven　water　harvesting　using　nanoporous　membranes　to　thermal　management　of　high-power　electronics　via　coolant　evaporation　from　nanoscale　pores.　In　this　work,　the　direct　simulation　Monte　Carlo　(DSMC)　method　was　used　to　simulate　evaporation　from　nanopores　into　the　half-space,　with　an　axisymmetric　computational　domain　which　conforms　to　the　real　nanopore　geometry.　According　to　the　position　of　liquid-vapor　interface,　the　evaporation　regime　was　divided　into:　pinning　and　receding.　In　the　pinning　regime,　the　interface　was　pinned　at　the　top　of　the　nanopores.　A　range　of　Knudsen　numbers　and　Mach　numbers　were　compared,　and　the　structure　of　the　Knudsen　layer　was　also　identified　in　detail.　The　Knudsen　layer　thickness　was　less　than　10,1　at　low　Mach　number　and　grew　to　nearly　40　lambda　at　Ma(infinity)　=　0.785.　We　also　examined　the　effects　of　porosity　on　evaporation　mass　flux.　The　effects　of　the　receding　length　were　researched　in　the　receding　regime.　The　downstream　density　decreased　from　2.4　x　10(-3)　to　4.29　x　10(-4)　kg/m(3)　with　the　receding　ratio　from　1　to　20.　Furthermore,　the　evaporation　coefficient　was　established　to　determine　its　impact　on　gas　flow.　The　present　results　highlighted　the　non-equilibrium　and　non-continuum　features　of　nanoporous　evaporation,　providing　insights　into　the　rarefied　gas　dynamics　within　nanopores　coupled　to　the　liquid-vapor　phase　change.　(C)　2021　Elsevier　B.V.　All　rights　reserved.