聚合物添加剂对湍流传热的瑞利-贝纳德对流的影响。
Effect of a polymer additive on heat transport in turbulent Rayleigh-Bénard convection.
机构信息
Department of Physics, University of California, Santa Barbara, California 93106, USA.
出版信息
Phys Rev Lett. 2010 Jan 22;104(3):034503. doi: 10.1103/PhysRevLett.104.034503. Epub 2010 Jan 21.
Abstract
Measurements of heat transport, as expressed by the Nusselt number Nu, are reported for turbulent Rayleigh-Bénard convection of water containing up to 120 ppm by weight of poly-[ethylene oxide] with a molecular weight of 4x10{6} g/mole. Over the Rayleigh number range 5x10{9} less than or approximately Ra less than or approximately 7x10{10} Nu is smaller than it is for pure water by up to 10%.
摘要
对于含有高达 120ppm 重量比、分子量为 4x10{6} 克/摩尔的聚[氧化乙烯]的水的湍流传热，用努塞尔数 Nu 表示的热传输测量值被报道。在瑞利数范围 5x10{9} 到 Ra 约小于或等于 7x10{10} 内，Nu 值比纯水小，最大可达 10%。
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