复旦大学《大学物理》课件-第3讲(1).pptVIP免费

大学物理（热学）1)MeanFreePath2)Diffusion,Thermalconductivity,andViscosity2006-10-12EquilibriumdistributionNvvvvN222212dnisthenumberofmoleculesxxxvvvdvyvy+dvyzzzvvvdinNnvNnviiid22Nvnvn222211nithenumberofmoleculesofivnearvamongNmolecules,howmanyarenearvprobabilitythatonemoleculeisnearvproportionaltodvx...xxvvfdMeaningofdn/Nddd),,(dzzyyxxzyxvvfvvfvvfNvvvnIsotropicassumption2222zyxzyxvvvvvfvfvf22expxxvCvfThesolutionisTheprobabilityshouldbenormalizedNnd13223dexpd1xxvvCNn...