Conjugate heat transfer analysis of liquid-vapor two phase flow in a microtube: A numerical investigation

Tiwari, Nishant; Moharana, Manoj Kumar

doi:10.1016/j.ijheatmasstransfer.2019.07.077

Cited by 35 publications

(12 citation statements)

References 49 publications

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“…The design and development of efficient heat exchanging systems (Kumar et al , 2016; Pati et al , 2020; Mehta and Pati, 2018, 2020a, 2020b, 2021a, 2021b; Sujith et al , 2021; Tiwari and Moharana, 2019a, 2019b, 2019c, Tiwari et al , 2017) is an important area of research because of its wide range of engineering applications such as solar collector, electro-chemical, geothermal processes and flow boiling (Evangelos et al , 2019; Fahim et al , 2016). In this context, researchers have commonly used two methods for heat transfer enhancement; namely, active and passive ones.…”

Section: Introductionmentioning

confidence: 99%

Analysis of thermo-hydraulic and entropy generation characteristics for flow through ribbed-wavy channel

Mehta

Pati

Ahmed

et al. 2021

HFF

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Purpose The purpose of this study is to analyze the thermal, hydraulic and entropy generation characteristics for laminar flow of water through a ribbed-wavy channel with the top wall as wavy and bottom wall as flat with ribs of three different geometries, namely, triangular, rectangular and semi-circular. Design/methodology/approach The finite element method-based numerical solver has been adopted to solve the governing transport equations. Findings A critical value of Reynolds number (Recri) is found beyond which, the average Nusselt number for the wavy or ribbed-wavy channel is more than that for a parallel plate channel and the value of Recri decreases with the increase in a number of ribs and for any given number of ribs, it is minimum for rectangular ribs. The performance factor (PF) sharply decreases with Reynolds number (Re) up to Re = 50 for all types of ribbed-wavy channels. For Re > 50, the change in PF with Re is gradual and decreases for all the ribbed cases and for the sinusoidal channel, it increases beyond Re = 100. The magnitude of PF strongly depends on the shape and number of ribs and Re. The relative magnitude of total entropy generation for different ribbed channels varies with Re and the number of ribs. Practical implications The findings of the present study are useful to design the economic heat exchanging devices. Originality/value The effects of shape and the number of ribs on the heat transfer performance and entropy generation have been investigated for the first time for the laminar flow regime. Also, the effects of shape and number of ribs on the flow and temperature fields and entropy generation have been investigated in detail.

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Section: Introductionmentioning

confidence: 99%

Analysis of thermo-hydraulic and entropy generation characteristics for flow through ribbed-wavy channel

Mehta

Pati

Ahmed

et al. 2021

HFF

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“…C, The methodologies for field modeling. D, The heat transfer between two‐phase flow and plate 145‐149 [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Thermal Theory and Simulated Thermal Modelsmentioning

confidence: 99%

“…The results and analysis deliver the guidance for the future design of cooling plate, and also contribute to the selection of coolant according to the specific application. Tiwari et al 149 introduced the heat transfer efficiency of liquid‐vapor two‐phase flow in a microtube, and the modeling theory of two‐phase flow delivers the potential promotion to other cooling plates.…”

Section: Thermal Theory and Simulated Thermal Modelsmentioning

confidence: 99%

Essential technologies on the direct cooling thermal management system for electric vehicles

Yang

Zhou

et al. 2021

Intl J of Energy Research

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As the increasing concern of degradation or thermal runaway of lithium-ion batteries, direct cooling system on electric vehicles draws much attention and has been broadly researched. Although satisfactory energy efficiency and thermal performance can be achieved according to current appliances, in-depth discussion of system design and modeling is still necessary for providing mature applications. Herein, a comprehensive review of direct cooling system is presented, and essential components on the overall design are introduced as 4C chain (construction of the system, component modeling, cooling plate design, and coolant selection). Construction, coolant, cooling plate, and component modeling are presented independently for discussing the research progress, where detailed information is provided contributing to the selection of essential components. Moreover, the typical applications on electric vehicles of direct cooling are also investigated, and more productions are under research. Apart from system designing, the environmental fitness is also considered and the defects are summarized for system optimization.Considering to achieve future innovative application, digital twin model-based method is delivered for providing the guidance of prospective direct cooling system design, and the method enhances the potential to achieve better thermal management based on digital technologies and cloud-control platform. Based on the innovative development of cloud-controlling platform design and electronic and electrical architecture, the cloud battery controlling provides the chances for online elaborate model-based operation and precise model-based controlling strategy for novel direct cooling system. Novelty StatementA comprehensive review on the general construction of system is presented, and essential components of direct cooling system are also summarized for optimizing the system efficiency. The article highlights the research profile of

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“…Several research investigations have been carried out on convective heat transfer enhancement techniques using porous media due to its wide engineering applications (Ould-amer et al , 1998; Akbarzadeh et al , 2019; Mehta and Pati, 2021a). Moreover, the corrugated channel is also an effective method used in thermal systems to augment the heat transfer rate (Ng and Wang, 2010; Akbarzadeh et al , 2017; Pati et al , 2017; Li and Sunden, 2018; Srinivasacharya and Kumar, 2015; Shubham et al , 2018; Tiwari and Moharana, 2019a, 2019b, 2020, 2021; Mehta and Pati, 2018, 2019, 2020a, 2020b, 2021b, 2021c, 2021d; Shenoy et al , 2016). These two combined methods are used in various applications, including solar collectors (Hatami and Jing, 2017; Priyam and Chand, 2016), chemical industries (Gray et al , 2013) and heat exchangers (Aneesh et al , 2018; Kim and Rhee, 2018).…”

Section: Introductionmentioning

confidence: 99%

Analysis of hydrothermal performance for laminar forced convective flow through a wavy channel with porous blocks

Mehta

Pati

2023

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Purpose The purpose of this paper is to investigate computationally the hydrothermal characteristics for forced convective laminar flow of water through a channel with a top wavy wall and a flat bottom wall having metallic porous blocks. Design/methodology/approach The governing equations are solved computationally using a finite element method–based numerical solver COMSOL Multiphysics® for the following range of parameters: 10 ≤ Reynolds number (Re) ≤ 500 and 10–4 ≤ Darcy number (Da) ≤ 10–1. Findings The presence of porous blocks significantly influences the heat transfer rate, and the value of local Nusselt number increases with the increase in Da. The value of the average Nusselt number decreases with Da for the top wall and the same is enhanced for the bottom wall of the wavy channel with porous blocks (WCPB). The value of the average Nusselt number for WCPB is significantly higher than that of the wavy channel without porous block (WCWPB), plane channel without porous block (PCWPB) and plane channel with the porous block (PCPB) at higher Re. For PCPB, the performance factor (PF) is always higher than that of WCWPB and WCPB for Da = 10–4 and Da = 10–3. Also, PF for WCPB is higher than that of WCWPB for higher Re except for Da = 10–4. Further, the value of for WCPB is higher than that of PCPB at Da = 10–2 and 10–1 at Re = 500. Practical implications The current study is useful in designing efficient heat exchangers for process plants, solar collectors and aerospace applications. Originality/value The analysis of thermo-hydraulic characteristics for laminar flow through a channel with a top wavy wall and a flat bottom wall having metallic porous blocks have been analyzed for the first time. Further, a comparative assessment of the performance has been performed with a wavy channel without a porous block, a plane channel without a porous block and a plane channel with porous blocks.

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Conjugate heat transfer analysis of liquid-vapor two phase flow in a microtube: A numerical investigation

Cited by 35 publications

References 49 publications

Analysis of thermo-hydraulic and entropy generation characteristics for flow through ribbed-wavy channel

Analysis of thermo-hydraulic and entropy generation characteristics for flow through ribbed-wavy channel

Essential technologies on the direct cooling thermal management system for electric vehicles

Analysis of hydrothermal performance for laminar forced convective flow through a wavy channel with porous blocks

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