论文标题
边界层厚度依赖于层流和瞬态对流状态的层高度的依赖性
Dependence of boundary layer thickness on layer height in laminar and transient convective regimes
论文作者
论文摘要
研究边界层厚度对层流和瞬态状态的层高度的依赖性进行了研究，以从带有开放表面的局部热源对流。努塞尔特数量和热羽形形成的特征频率的测量是针对各种雷利数，不同的prandtl数量和不同纵横比的测量值。获得的结果证明，对于开发的（但不是湍流）的对流流，边界层厚度几乎与层高度无关，并且主要由施加的温度差和流体的物理特性来定义。
Dependence of boundary layer thickness on layer height in laminar and transient regimes is studied for convection from localised heat source with an open surface. The measurements of Nusselt number and characteristic frequency of thermal plume formation are done for a wide range of Rayleigh number, different Prandtl numbers and different aspect ratios. The obtained results prove that for the developed (but not turbulent) convective flow the boundary layer thickness is almost independent of the layer height and it is mainly defined by applied temperature difference and physical properties of the fluid.
