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Abstract <p>The flow and heat transfer in channels with a negative pressure gradient are numerically simulated using a three-parameter differential RANS turbulence model supplemented with a transfer equation for a turbulent heat flux. The flow in a planar converging channel with a small wall inclination angle is considered in a wide range of Reynolds numbers. Heat transfer in the flow of a helium-xenon gas mixture in a heated pipe is studied in a wide range of heat fluxes into the pipe wall. The flow acceleration parameter that ensures laminarization of the turbulent flow in the channel is estimated.</p>

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Numerical Modeling of Flow Laminarization in Channels with a Negative Pressure Gradient

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • V. G. Lushchik,
  • A. I. Reshmin

摘要

Abstract

The flow and heat transfer in channels with a negative pressure gradient are numerically simulated using a three-parameter differential RANS turbulence model supplemented with a transfer equation for a turbulent heat flux. The flow in a planar converging channel with a small wall inclination angle is considered in a wide range of Reynolds numbers. Heat transfer in the flow of a helium-xenon gas mixture in a heated pipe is studied in a wide range of heat fluxes into the pipe wall. The flow acceleration parameter that ensures laminarization of the turbulent flow in the channel is estimated.