粘性和热导率随时间变化的麦克斯韦材料的 Falkner-Skan 流动的热特性

Q1 Chemical Engineering International Journal of Thermofluids Pub Date : 2024-08-27 DOI:10.1016/j.ijft.2024.100833
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引用次数: 0

摘要

目前的研究描述了在 Falkner-Skan 流体作用下,楔形流体上麦克斯韦流体的热固性属性。其中包括与温度相关的粘度和电导率的有效性,以及辐射能和活化能的考虑。在利用 PDE 的类似变量后,将问题结构化为 ODE。使用 MATLAB 中的高效技术 bvp4c 对非线性方程进行数值处理。通过核算三种不同的楔形情况,即 λ = 0(静态)、λ <0(收缩)和 λ >0(拉伸),对各种相关因素表示了图形结果。壁面阻力、热梯度和质量梯度也在比较意义上进行了列举。定义的参数范围很广,例如 0.3 ≤ A ≤ 0.7、0.2 ≤ β ≤ 0.6、0.5 ≤ M ≤ 1.5、0.2 ≤ Bi ≤ 0.7、0.5 ≤ m ≤ 1.3、2.0 ≤ Pr ≤ 3.0、0.3 ≤ Q ≤ 0.7 和 0.2 ≤ Rd ≤ 0.6。本研究的结论是,当德博拉数和不稳定性参数值较大时,沿静态楔形、拉伸楔形和收缩楔形的速度剖面变得渐进。温度曲线显示出与辐射参数和比奥特数相对应的同样的升高行为。壁面阻力减小,与其他两种情况相比,拉伸楔形时的热通量系数有相反的变化。
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Thermal characteristics of Falkner-Skan flow of time-dependent Maxwell material with varying viscosity and thermal conductivity

Thermosolutal attributes of Maxwell fluid over a riga wedge subjected to Falkner-Skan flow is described in current work. The effectiveness of the temperature-dependent viscosity and conductivity, along with the consideration of the radiative and activation energies, are included. Problem structuring is conceded into ODE's after utilizing similar variables on the PDE's. An efficient technique bvp4c in MATLAB is implemented to numerically tackle the nonlinear equations. Graphical outcomes are expressed for various involved factors by accounting three different wedge situations are illustrated i.e. λ = 0 (static), λ < 0 (shrinking) and λ > 0 (stretching). Wall drag, heat and mass gradients are also enumerated in comparative sense. Wide range of parameters are defined for instance, 0.3 ≤ A ≤ 0.7,  0.2 ≤ β ≤ 0.6,  0.5 ≤ M ≤ 1.5,  0.2 ≤ Bi ≤ 0.7,  0.5 ≤ m ≤ 1.3,  2.0 ≤ Pr ≤ 3.0,  0.3 ≤ Q ≤ 0.7,  and 0.2 ≤ Rd ≤ 0.6. The present study concludes that the velocity profile becomes progressive in the presence of larger values of the Deborah number and the unsteadiness parameter along the static, stretching, and shrinking wedges. The temperature profile shows the same elevating behavior corresponding to the radiation parameter and Biot number. The wall drag force is found to be reduced, and contrary aspects were noticed in the heat flux coefficient when the wedge is stretched compared to the other two cases.

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来源期刊
International Journal of Thermofluids
International Journal of Thermofluids Engineering-Mechanical Engineering
CiteScore
10.10
自引率
0.00%
发文量
111
审稿时长
66 days
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