<正> Chaotic phenomena in the wake of thermal convection flow fieldsabove a heating flat plate were investigated experimentally. A newly developed elec-tron beam fluorescence technique (EBF) was used to simultaneously measure densityfluctuation at 7 points in a cross section above the plate. Correlation dimensions,intermittence coefficients, Fourier spectrum have been obtained for different Grashofnumbers. Spatial distribution of correlation dimensions are presented. The experi-mental result shows that there...
【英文摘要】
Chaotic phenomena in the wake of thermal convection flow fields above a heating flat plate were investigated experimentally. A newly developed elec- tron beam fluorescence technique (EBF) was used to simultaneously measure density fluctuation at 7 points in a cross section above the plate. Correlation dimensions, intermittence coefficients, Fourier spectrum have been obtained for different Grashof numbers. Spatial distribution of correlation dimensions are presented. The experi- mental result shows that the...
【基金】
The project supported by the National Natural Science Foundation of China
【更新日期】
2010-10-19
【分类号】
O157
【正文快照】
1 INTRODUCTION Tliere are two:najor aspeets for turl)ulenee researell.o工le 15 trying to prediet time-5 Ioatial average properties of flow field based 011 vaz注ous theoretieal or enzpirieal models andrandollz nlotioll of states 15 its Prerequisite assunzP
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