表面温度非等温的球形整体混合对流的局部非相似解与热分析

IF 1.8 4区 物理与天体物理 Q3 PHYSICS, APPLIED Modern Physics Letters B Pub Date : 2024-07-20 DOI:10.1142/s0217984924504876
Md. Latifur Rahman Emom, M. Ferdows, Mohamed R. Eid
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引用次数: 0

摘要

本研究探讨了在壁温不等温的刚性球形周围流动的混合对流边界层的行为。研究中假定流体具有不可压缩性和粘性。主要目的是研究非均匀表面温度对流动模式的影响,包括速度轮廓和温度轮廓。利用局部非相似性方法对边界层流动的修正守恒方程进行了检验。使用 MATLAB 内置代码 bvp4c 寻找计算解。结果显示了空气和水的流动情况,尤其是在温度为 21°C 的情况下。速度和温度曲线显示了几个因素的影响,如混合对流变量[公式:见正文]和壁面温度函数[公式:见正文]中的指数[公式:见正文])。此外,该研究还计算了局部摩擦力系数和局部壁面热传导系数,并将这些值与先前的研究结果进行了比较。值得注意的是,该研究将下停滞点周围的数据扩展到了球体内的其他位置,从而提供了对整个流场的全面理解。
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Local nonsimilar solution and heat analysis of mixed convective flow across whole spherical shape with nonisothermal surface temperature
This study investigates the behavior of a mixed convective boundary layer flowing around a rigid spherical shape with non-isothermal wall temperature. The fluid assumed in this examination exhibits both incompressibility and viscosity. The major purpose is to examine the impact of the non-uniform surface temperature on the flow patterns, including velocity outlines and temperature outlines. An examination is conducted on the modified conservation equations of the boundary layer flow utilizing the local non-similarity method. The MATLAB built-in code bvp4c is used to find computational solutions. The outcomes are then shown for both air and water, specifically at a temperature of 21°C. The influence of several factors, such as the mixed convective variable [Formula: see text] and the exponent [Formula: see text] in the wall temperature function [Formula: see text]), is shown in velocity and temperature profiles. In addition, the study computes the local frictional force factor and local wall heat transport factor and compares these values with results from earlier research. Significantly, the study expands upon data made around the lower stagnating point to include other sites within the sphere, thereby offering a thorough comprehension of the whole flowing field.
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来源期刊
Modern Physics Letters B
Modern Physics Letters B 物理-物理:凝聚态物理
CiteScore
3.70
自引率
10.50%
发文量
235
审稿时长
5.9 months
期刊介绍: MPLB opens a channel for the fast circulation of important and useful research findings in Condensed Matter Physics, Statistical Physics, as well as Atomic, Molecular and Optical Physics. A strong emphasis is placed on topics of current interest, such as cold atoms and molecules, new topological materials and phases, and novel low-dimensional materials. The journal also contains a Brief Reviews section with the purpose of publishing short reports on the latest experimental findings and urgent new theoretical developments.
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