关键词: Bioconvection MWCNT Motile microorganisms Prandtl hybrid nanofluid SWCNT Soret and Dufour Thermal radiation magneto-hydrodynamic

来  源:   DOI:10.1038/s41598-024-62647-2   PDF(Pubmed)

Abstract:
Numerous heat transfer applications, such as heat exchangers, solar trough collectors, and fields including food processing, material research, and aerospace engineering, utilize hybrid nanofluids. Compared to conventional fluids, hybrid nanofluids exhibit significantly enhanced thermal conductivity. The aim of this work is to explore flow and heat transmission features under of magneto-hydrodynamic bioconvective flow of carbon nanotubes over the stretched surface with Dufour and Soret effects. Additionally, comparative dynamics of the carbon nanotubes (SWCMT - MWCNT/C2H6O2 with SWCMT - MWCNT/C2H6O2 - H2O) flow using the Prandtl fluid model in the presence of thermal radiation and motile microorganisms has been investigated. Novel feature Additionally, the focus is also to examine the presence of microorganisms in mixture base hybrid nanofluid. To examine heat transfer features of Prandtl hybrid nanofluid over the stretched surface convective heating is taken into consideration while modeling the boundary conditions. Suitable similarity transform has been employed to convert dimensional flow governing equations into dimensionless equations and solution of the problem has been obtained using effective, accurate and time saving bvp-4c technique in MATLAB. Velocity, temperature, concentration and microorganisms profiles have been demonstrated graphically under varying impact of various dimensionless parameters such as inclined magnetization, mixed convection, Dufour effect, Soret effect, thermal radiation effect, and bioconvection lewis number. It has been observed that raising values of magnetization (0.5 ≤ M ≤ 4), mixed convection (0.01 ≤ λ ≤ 0.05) and inclination angle (0° ≤ α ≤ 180°) enhance fluid motion rapidly in Ethylene glycol based Prandtl hybrid nanofluid (SWCMT - MWCNT/C2H6O2) when compared with mixture base working fluid of carbon nanotubes SWCMT - MWCNT/C2H6O2 - H2O). Raising thermal radiation (0.1 ≤ Rd ≤ 1.7) and Dufour number (0.1 ≤ Du ≤ 0.19) values improves temperature profile. Moreover, a good agreement has been found between the current outcome and existing literature for skin friction outcomes.
摘要:
许多传热应用,如热交换器,太阳能槽式集热器,以及包括食品加工在内的领域,材料研究,和航空航天工程,利用混合纳米流体。与传统流体相比,混合纳米流体表现出显著增强的导热性。这项工作的目的是探索碳纳米管在具有Dufour和Soret效应的拉伸表面上的磁流体动力学生物对流流动下的流动和传热特征。此外,在存在热辐射和活动微生物的情况下,使用Prandtl流体模型研究了碳纳米管(SWCMT-MWCNT/C2H6O2与SWCMT-MWCNT/C2H6O2-H2O)流动的比较动力学。新颖的功能此外,重点也是检查微生物在混合物基础混合纳米流体的存在。为了检查Prandtl混合纳米流体在拉伸表面上的传热特征,在对边界条件进行建模时考虑了对流加热。已采用适当的相似性变换将维流控制方程转换为无量纲方程,并使用有效的方法获得了问题的解决方案,在MATLAB中准确和节省时间的bvp-4c技术。速度,温度,浓度和微生物谱已被证明在各种无量纲参数如倾斜磁化的不同影响下,混合对流,Dufour效应,Soret效应,热辐射效应,和生物对流刘易斯数。已经观察到提高磁化强度值(0.5≤M≤4),与碳纳米管的混合基础工作流体相比,混合对流(0.01≤λ≤0.05)和倾角(0°≤α≤180°)迅速增强了基于乙二醇的Prandtl杂化纳米流体(SWCMT-MWCNT/C2H6O2)的流体运动。SWCMT-MWCNT/C2H6O2-H2O)。提高热辐射(0.1≤Rd≤1.7)和Dufour数(0.1≤Du≤0.19)值可改善温度分布。此外,目前的结果与现有文献对皮肤摩擦结果有很好的一致性.
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