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Thermocapillary convection in a shallow annular pool heated from inner wall

  • Physics Of Contact Line And Wetting/Thermocapillary Flows
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Abstract

In order to discover the effect of heating direction on the thermocapillary convection, three-dimensional numerical simulations have been conducted in a shallow annular pool (depth d=1 mm) of silicone oil (0.65 cSt, Pr=6.7) differentially heated from the inner wall. The linear stability analysis predicts a critical temperature difference (ΔTc) for the incipience of hydrothermal wave (HTW) is 4.58K, which is less than ΔTc=5.0K for a pool heated at the outer wall. Numerical simulations predict that two groups of HTWs, propagating in azimuthal directions opposite to each other, always coexist in the pool. Simulations with pool rotation around the axis elucidate that pool rotation up to 1.05 rad/s gives no distinguishable effect on the behavior of HTW in an inner heated pool, whereas the HTW patterns in an outer heated pool are significantly modified by rotation.

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Authors and Affiliations

  1. College of Power Engineering, Chongquing University, 400044, Chongqing, China

    Wanyuan Shi

  2. Institute for Materials Chemistry and Engineering, Kyushu University, Japan

    Nobuyuki Imaishi

Authors
  1. Wanyuan Shi
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  2. Nobuyuki Imaishi
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Additional information

Paper was presented for the Second International Topical Team Workshop on TWO-PHASE SYSTEMS FOR GROUND AND SPACE APPLICATIONS October 26–28, 2007, Kyoto, Japan.

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Shi, W., Imaishi, N. Thermocapillary convection in a shallow annular pool heated from inner wall. Microgravity Sci. Technol 19, 104–105 (2007). https://doi.org/10.1007/BF02915766

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  • DOI: https://doi.org/10.1007/BF02915766

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