具有焦耳热源和滑移效应的倾斜磁化流中纳米流体的热意义分析

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2024-09-28 DOI:10.1016/j.nanoso.2024.101349

Faisal Mumtaz , Tasawar Abbas , Adil Jhangeer , Ijaz Ali

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引用次数: 0

摘要

工程应用领域对有效热管理系统的需求日益增长，使用纳米流体可提高系统性能。与典型流体相比，纳米流体具有更强的热特性，为工业中的热传输过程提供了一种有效的方法。这项研究尤其适用于传统流体不足以改善热性能的系统。了解焦耳热、磁场和滑移条件的整体影响将有益于飞机、微电子学和生物医学工程等领域。本研究分析了纳米流体在倾斜磁流中的热学意义，同时考虑了滑移效应和焦耳热源。当前研究的动机是在存在滑移条件的情况下，研究磁流体（MHD）纳米流体在焦耳热影响下的流动和传热行为。基于守恒定律和合适的边界条件，建立了质量、动量、能量和纳米粒子浓度的控制公式。在这项热学研究中，通过非线性拉伸构型对二维非稳态纳米流体流动进行了数值研究，并以非均匀热源为例。通过相似性转换，水磁流体的化学辐射和滑移效应参数的控制偏微分方程被转换成一组常微分方程（ODE）。为了求解这些方程，采用了数值方法。研究发现，速度、传质、温度、浓度、传热和表皮摩擦系数受到化学反应、辐射参数和速度滑移的显著影响。在计算中可以观察到影响传热和速度变化的参数的图示。

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Analysis of thermal significances of nanofluids in inclined magnetized flow with Joule heating source and slip effects

The growing need for effective thermal management systems in engineering applications will improve performance by using nanofluids. Nanofluids, which show enhanced thermal characteristics compared to typical fluids, offer an effective way for heat transmission processes in industries. This study is particularly useful for systems where traditional fluids are insufficient for improving thermal performance. Understanding the overall impacts of Joule heating, magnetic fields, and slip conditions would be beneficial in fields such as aircraft, microelectronics, and biomedical engineering.

The thermal significances of nanofluids in an inclined magnetized flow are analyzed in this work, taking slip effects and the Joule heating source into account. The motivation behind the current research is to investigate the flow and heat transfer behavior of magnetohydrodynamic (MHD) nanofluid under the influence of Joule heating in the presence of slip conditions.

Based on conservation laws and suitable boundary conditions, the governing formulas for mass, momentum, energy, and nanoparticle concentration are developed. In this thermal investigation, unsteady nanofluid flow in two dimensions via a nonlinear stretched configuration is studied numerically together with an example of a non-uniform heat source. Using similarity transformation, the governing partial differential equation for chemical radiation and slip effects parameters for hydromagnetic flow is transformed into a set of ordinary differential equation (ODE). To solve these equations, a numerical method is applied. This study found that the velocity, mass transfer, temperature, concentration, heat transfer, and skin friction coefficient are significantly influenced by the chemical reaction, radiation parameter, and velocity slip. A graphical representation of the parameters influencing the heat transfer and the velocity changes in calculation is observed.

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .