International journal of thermofluids 

About: International journal of thermofluids is an academic journal published by Elsevier BV. The journal publishes majorly in the area(s): Engineering & Environmental science. It has an ISSN identifier of 2666-2027. It is also open access. Over the lifetime, 234 publications have been published receiving 736 citations.

Thermal Energy and Mass Transport of Shear Thinning Fluid under Effects of Low to High Shear Rate Viscosity

Abstract: The current investigation is deliberated the flow and heat transfer of a shear thinning fluid over a non-linear stretching sheet has variable thickness. All rheological aspects at low to high shear rates are accounted theoretical by using generalized Carreau model of viscosity. Theoretical flow model is formulated for boundary layer phenomena by applying boundary layer approximations and then convert it from partial differential equations to ordinary differential equations with the help of similarity transformations. The solution is obtained by numerical method and the result are displayed in the form of velocity and temperature profiles under impact of rheological and geometrical governing parameters. In addition, the results of skin friction coefficient and Nusselt number are obtained under effects of these parameters. It is found that Nusselt number is significantly decreased when stretching is increased by velocity index parameter.

Battery thermal management systems: Recent progress and challenges

Abstract: In recent years, attention has been drawn to battery thermal safety issues due to the importance of personal safety and vehicle service security. The latest advancements in battery thermal management (BTM) are conducted to face the expected challenges to ensure battery safety. The BTM technology enhances battery safety with a heat transfer intensifying method, which guarantees the battery operation performance based on the battery's thermokinetic, electrochemical, and mechanical characteristics at normal and abnormal operating conditions. Preventing overheating and providing an ideal working temperature for safe operation are also important. Therefore, developing a BTM system that is both safe and reliable has a vital research goal. A comprehensive review of BTM with enhanced safety is presented in this article. The present study introduces the advances in the applications of BTM with cyclic stability served, high energy density, and electrification of automobiles. A summary of relevant research is also provided to improve thermo-safe design innovation and cooperative optimization to meet the needs of green-energy vehicle commercialization. The current work discusses the applications of air, liquid, nanofluids, phase change material, heat pipe, and combinations of these technics for BTM. Finally, the current study describes the challenges and prospects for utilizing different types of BTM to distribute its technology for diverse applications. The present study shows that proper thermal management system (TMS) is required to increase the batteries' efficiency and lifetime. However, each TMS has its characteristics that differ from one to one. Therefore, the proposed TMS's configuration and optimum performance must be examined before real application.

A critical review of the straight and wavy microchannel heat sink and the application in lithium-ion battery thermal management

Abstract: As demand for high-performance heat transfer increases, interest in microchannel heat sinks as a viable solution for heat flux removal in thermal devices has grown significantly. Microchannel heat sinks with straight and wavy designs are the two main varieties that have been the focus of extensive research in this field. The current paper provides beneficial information regarding the different designs and methods for heat enhancement and overall thermal performance in straight and wavy microchannel heat sinks. Besides using nanofluids, modified designs improve heat transfer performance due to incorporating secondary flow. Moreover, utilizing microchannels as indirect cooling methods in lithium-ion battery thermal management is discussed in this review. This study discusses current issues and future research directions.

Performance Evaluation of Nanofluids in Loop Heat Pipes and Oscillating Heat Pipes

Abstract: Nanofluids have been presented as media to enhance the heat transfer capabilities of thermal control systems and devices of both single and two-phase heat transfer modes. Since the addition of solid nanoparticles in a base fluid can significantly increase the thermal and transport properties of a given working fluid, it impacts other properties that require a proper evaluation before applying the nanofluid in a thermal system. Successful application of nanofluids in liquid cooling systems including single-phase convection in heat exchangers and two-phase systems like heat pipes and thermosyphon have indicated the potential in using such a novel working fluid to improve their thermal efficiency. An evaluation related to the performance enhancement using nanofluids in two-phase cooling systems is presented, which aims to show how nanofluids’ can play an important role in current and future thermal control devices' design and operation.

MHD mixed convection heat transfer of nanofluid containing oxytactic microorganisms inside a vertical annular porous cylinder

Abstract: For the first time, MHD mixed convection heat transfer of nanofluid containing oxytactic microorganisms is investigated inside a vertical annular porous cylinder. In this work, governing equations presented by Kuznetsov concerning the nanofluid flow inside porous media in the presence of microorganisms are initially extended for the case of cylindrical coordinates, and then numerically solved using the FVM approach. Having conducted a comparison with previous studies, the numerical method's accuracy has been successfully validated. The simulations are undertaken for different parameters including bioconvection Rayleigh number, Hartmann number, product of Reynolds and Prandtl numbers, bioconvection Peclet number, traditional and bioconvection Lewis numbers, aspect ratio, and radius ratio for the case of horizontal magnetic field exertion. Obtained results are presented in terms of graphical streamlines, isothermal lines, isoconcentration of nanoparticles, oxygen, and microorganisms as well as physical quantities of interest. Based on outcomes, it is concluded that microorganisms’ presence results in heat transfer attenuation, while an increase in the Hartmann number leads to the average Nusselt number amelioration.