knudsen flow meaning in English

克努森流动
克努曾流
努特森气流

Theory calculation and derivation demonstrate that the heat conduction of membrane exerts little influence on performance . the characteristics of mass transfer through membrane are mixed flow including knudsen flow and poiseuille flow , which moreover , vary with operational variables
理论推导与计算表明：膜的导热性对真空膜蒸馏过程的影响可以忽略，膜蒸馏过程膜内质量传输机制是努森流与粘性流共同作用的混合流机制。