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


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Numerical simulation of flow and heat transfer in channels with a negative pressure gradient is carried out using a three-parameter differential RANS turbulence model supplemented by a transfer equation for a turbulent heat flux. The flow in a flat confuser with small values of the wall inclination angle is considered in a wide range of Reynolds numbers. Heat transfer during the flow of a helium-xenon gas mixture in a heated pipe is investigated in a wide range of heat fluxes into the pipe wall. Estimates are obtained for the flow acceleration parameter that ensures laminarization of the turbulent flow in the channel.

flow with heat exchange, RANS turbulence model, flat confuser, heated pipe.

DOI: http://doi.org/10.33257/PhChGD.25.4.1121


Volume 25, issue 4, 2024 year


Численное моделирование ламинаризации течения в каналах с отрицательным градиентом давления

Численное моделирование течения и теплообмена в каналах с отрицательным градиентом давления проведено с использованием трехпараметрической дифференциальной RANS-модели турбулентности, дополненной уравнением переноса для турбулентного потока тепла. Рассмотрено течение в плоском конфузоре с малыми величинами угла наклона стенки в широком диапазоне чисел Рейнольдса. Исследован теплообмен при течении гелий-ксеноновой смеси газов в обогреваемой трубе в широком диапазоне величин тепловых потоков в стенку трубы. Получены оценки параметра ускорения потока, обеспечивающего ламинаризацию турбулентного течения в канале.

течение с теплообменом, RANS-модель турбулентности, плоский конфузор, труба с подогревом.

DOI: http://doi.org/10.33257/PhChGD.25.4.1121


Volume 25, issue 4, 2024 year



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