Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Direct Numerical Simulation of Mass Transfer in Turbulent new Around a Rotating Circular Cylinder ( I ) - At Sc=1670 -

회전하는 원형단면 실린더 주위의 난류유동 물질전달에 대한 직접수치모사 ( I ) - 높은 Schmidt 수에 대하여 -

  • 황종연 (인하대학교 기계기술공동연구소) ;
  • 양경수 (인하대학교 기계공학부)
  • Published : 2005.07.01
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Abstract

In this paper, an investigation on high-Schmidt number (Sc=1670) mass transfer in turbulent flow around a rotating circular cylinder is carried out by Direct Numerical Simulation. The concentration field is computed for three different values of low Reynolds number, namely 161, 348 and 623 based on the cylinder radius and friction velocity. Statistical study reveals that the thickness of Nernst diffusive layer is very small compared with that of viscous sub-layer in the case of high Sc mass transfer. Strong correlation of concentration field with streamwise and vertical velocity components is observed. However, that is not the case with the spanwise velocity component. Instantaneous concentration visualization reveals that the length scale of concentration fluctuation typically decreases as Reynolds number increases. Statistical correlation between Sherwood number and Reynolds number is consistent with other experiments currently available.

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References

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