Sensitivity analysis of thermal optimisation within conical gap between the cone and the surface of disk with particle deposition

IF 3 3区 工程技术 Q2 CHEMISTRY, ANALYTICAL
S. Manjunatha, B. Ammani Kuttan, T. N. Tanuja
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引用次数: 0

Abstract

This work examines the thermal and flow characteristics of \(\left( {{\text{TiO}}_{2} + {\text{AgBr}} + {\text{GO}}/{\text{EG}}} \right)\) trihybrid nanofluid in the conical gap that exists between a disc and a cone. Effect of thermophoresis and particle deposition are examined to perceive the mass dissipation change on the surface. The governing equations of the problem are in the form of partial differential equations which are converted to nonlinear ordinary differential equations by applying proper scaling similarity transformations, and then the resultant equations are approximated numerically by using RKF45 technique. The interesting part of this research is to discuss the impact of various pertinent parameters on three cases namely: (1) rotating cone/disk (2) rotating cone/stationary disk and (3) stationary cone/rotating disk. The flow field, heat and mass transfer rates were analysed using graphical representations. Additionally, sensitivity analysis is performed on derived rate of heat transfer as a response function for input factors for different parameters. From the graph, it is perceived that flow field increases significantly with increase in the values of Reynolds numbers for both cone and disk rotations. Also, it is seen that temperature upsurges significantly for ascendent values of solid volume fraction of nanoparticles. It is also noticed that the sensitivity of the Nusselt number towards \(n\) is more for all the values of source/sink and for middle level values of \(n\).

有颗粒沉积的圆盘与圆锥间隙内热优化的灵敏度分析
本研究考察了\(\left( {{\text{TiO}}_{2} + {\text{AgBr}} + {\text{GO}}/{\text{EG}}} \right)\)三杂交纳米流体在圆盘和锥体之间存在的锥形间隙中的热和流动特性。研究了热泳和颗粒沉积对表面质量耗散变化的影响。该问题的控制方程为偏微分方程形式,通过适当的尺度相似变换将其转化为非线性常微分方程,然后利用RKF45技术对得到的方程进行数值逼近。本研究的有趣之处是讨论了各种相关参数对三种情况的影响,即:(1)旋转锥/圆盘(2)旋转锥/静止盘和(3)静止锥/旋转盘。用图形表示分析了流场、传热和传质速率。此外,对不同参数的输入因素作为响应函数的推导传热率进行了敏感性分析。从图中可以看出,无论是锥转还是盘转,流场都随着雷诺数的增大而显著增大。同时,随着纳米颗粒固体体积分数的增大,温度显著升高。我们还注意到,对于源/汇的所有值和\(n\)的中间水平值,努塞尔数对\(n\)的敏感性更大。
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来源期刊
CiteScore
8.50
自引率
9.10%
发文量
577
审稿时长
3.8 months
期刊介绍: Journal of Thermal Analysis and Calorimetry is a fully peer reviewed journal publishing high quality papers covering all aspects of thermal analysis, calorimetry, and experimental thermodynamics. The journal publishes regular and special issues in twelve issues every year. The following types of papers are published: Original Research Papers, Short Communications, Reviews, Modern Instruments, Events and Book reviews. The subjects covered are: thermogravimetry, derivative thermogravimetry, differential thermal analysis, thermodilatometry, differential scanning calorimetry of all types, non-scanning calorimetry of all types, thermometry, evolved gas analysis, thermomechanical analysis, emanation thermal analysis, thermal conductivity, multiple techniques, and miscellaneous thermal methods (including the combination of the thermal method with various instrumental techniques), theory and instrumentation for thermal analysis and calorimetry.
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