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On the impingement heat transfer of an oblique free surface plane jet

机译:关于斜自由表面平面射流的撞击传热

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The objective of the present study is to understand the hydrodynamics and heat transfer of the impingement process, particularly the complexities attributable to the asymmetric geometry of an oblique liquid plane jet. The Navier-Stokes equations are solved using a finite-volume formulation with a two-step projection method on a fixed non-uniform rectangular grid. The free surface of the jet is tracked by the volume-of-fluid method with a second order accurate piecewise-linear scheme. The energy equation is modeled by using an enthalpy-based formulation. The method provides a state-of-the-art comprehensive model of the dynamic and thermal aspects of the impinging process. Nusselt number plots and pressure distributions on the substrate are obtained. The locations of the maximum Nusselt number as well as maximum pressure on the surface are identified and compared with the geometric jet impingement point. Results for normal impingement are also obtained and are used as reference. The effects of several parameters are examined. These include jet Reynolds number, jet impingement angle and jet inlet velocity profile. Experimental and analytical data from the literature are also included for comparison.
机译:本研究的目的是了解撞击过程的流体动力学和传热,特别是由于倾斜的液体平面射流的不对称几何形状引起的复杂性。 Navier-Stokes方程是使用有限体积公式通过两步投影方法在固定的非均匀矩形网格上求解的。射流的自由表面通过流体体积方法使用二阶精确分段线性方案进行跟踪。使用基于焓的公式对能量方程进行建模。该方法提供了冲击过程动态和热方面的最新综合模型。获得基体上的努塞尔数图和压力分布。识别出最大努塞尔数以及表面上的最大压力的位置,并将其与几何射流撞击点进行比较。还获得了正常撞击的结果,并将其用作参考。检查了几个参数的影响。这些包括射流雷诺数,射流撞击角度和射流入口速度曲线。还包括来自文献的实验和分析数据以进行比较。

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