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Thermal aspects of Oldroyd-B nanofluid over accelerated surface with variable thermal conductivity and modified diffusion theories
International Journal of Modern Physics B ( IF 1.7 ) Pub Date : 2021-07-14 , DOI: 10.1142/s021797922150185x
Samaira Aziz 1 , Iftikhar Ahmad 1 , Sami Ullah Khan 2 , Nasir Ali 3
Affiliation  

The growing interest in emerging nanotechnologies has led the scientists towards to investigate the interaction of nanoparticles with fluids. Current continuation endeavors the rheological analysis for the Oldroyd-B nanomaterial across periodically accelerated and heated surface. The interesting features of thermophoresis and Brownian motions are presented by following famous Buongiorno nanofluid model. Further, Cattaneo–Christov heat and mass flux expressions are exploited to determine the characteristics of thermal and mass diffusions. As a novelty, the variable thermal conductivity and heat absorption/generation consequences are also utilizing the energy equation. The flow model has been developed by using concerning boundary layer equations which are converted into dimensionless forms by using appropriate variables. The analytical solution of such transmuted equations is computed by using homotopy analytic method. Various physical parameters of interest are scrutinized through various graphs. The observations from analysis convey a declining change in nanofluid concentration and temperature with variation of thermal and solutal relaxation parameters, respectively. Moreover, thermophoresis parameter causes an enhancement of concentration profile while a retarded concentration profile results with increment of Schmidt number. The obtained theoretical results reflect significant applications in cooling and heating systems, thermal sciences, manufacturing processes, extrusion systems, enhancement of transport of energy and heat resources.

中文翻译:

Oldroyd-B纳米流体在具有可变热导率和改进扩散理论的加速表面上的热特性

对新兴纳米技术日益增长的兴趣促使科学家们研究纳米粒子与流体的相互作用。目前继续致力于在周期性加速和加热表面上对 Oldroyd-B 纳米材料进行流变分析。通过遵循著名的 Buongiorno 纳米流体模型,呈现了热泳和布朗运动的有趣特征。此外,利用 Cattaneo-Christov 热通量和质量通量表达式来确定热扩散和质量扩散的特征。作为一种新颖性,可变热导率和热吸收/产生结果也利用了能量方程。通过使用相关的边界层方程开发了流动模型,这些方程通过使用适当的变量转换为无量纲形式。此类嬗变方程的解析解采用同伦解析法计算。通过各种图表仔细检查各种感兴趣的物理参数。分析的观察结果分别表明纳米流体浓度和温度随着热弛豫参数和溶质弛豫参数的变化而下降。此外,热泳参数导致浓度分布增强,而随着施密特数的增加,浓度分布延迟。所获得的理论结果反映了在冷却和加热系统、热科学、制造工艺、挤压系统、增强能源和热资源传输方面的重要应用。通过各种图表仔细检查各种感兴趣的物理参数。分析的观察结果分别表明纳米流体浓度和温度随着热弛豫参数和溶质弛豫参数的变化而下降。此外,热泳参数导致浓度分布增强,而随着施密特数的增加,浓度分布延迟。所获得的理论结果反映了在冷却和加热系统、热科学、制造工艺、挤压系统、增强能源和热资源传输方面的重要应用。通过各种图表仔细检查各种感兴趣的物理参数。分析的观察结果分别表明纳米流体浓度和温度随着热弛豫参数和溶质弛豫参数的变化而下降。此外,热泳参数导致浓度分布增强,而随着施密特数的增加,浓度分布延迟。所获得的理论结果反映了在冷却和加热系统、热科学、制造工艺、挤压系统、增强能源和热资源传输方面的重要应用。热泳参数导致浓度分布增强,而随着施密特数的增加,浓度分布延迟。所获得的理论结果反映了在冷却和加热系统、热科学、制造工艺、挤压系统、增强能源和热资源传输方面的重要应用。热泳参数导致浓度分布增强,而随着施密特数的增加,浓度分布延迟。所获得的理论结果反映了在冷却和加热系统、热科学、制造工艺、挤压系统、增强能源和热资源传输方面的重要应用。
更新日期:2021-07-14
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