A spectral relaxation method for three-dimensional MHD flow of nanofluid flow over an exponentially stretching sheet due to convective heating: an application to solar energy

Rao, M. Venkata Subba; Gangadhar, K.; Varma, P. L. N.

doi:10.1007/s12648-018-1226-0

Cited by 48 publications

(10 citation statements)

References 35 publications

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“…The use of porous media has emerged as one of the promising passive cooling techniques due to the intensified mixing of fluid streams and large contact surface area to volume ratio. The usage of nanofluid (Gangadhar et al, 2022a(Gangadhar et al, , 2022b(Gangadhar et al, , 2022c(Gangadhar et al, , 2022d(Gangadhar et al, , 2017Venkata Subba Rao et al, 2018) and a flow path with uneven geometry are the other passive cooling techniques. 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).…”

Section: Introductionmentioning

confidence: 99%

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

Mehta

Pati

2023

HFF

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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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Section: Introductionmentioning

confidence: 99%

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

Mehta

Pati

2023

HFF

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“…Gangadhar et al [10] examined the magnetization characteristics in couple stress radiative liquid through paraboloid surface with bi-convective transport. Some more significant researches in this direction are illustrated in references [11] , [12] , [13] , [14] , [15] .…”

Section: Introductionmentioning

confidence: 99%

Analysis of variable mass diffusivity in Maxwell's fluid with Cattaneo-Christov and nonlinear stratification

Jabeen¹,

Shafee²,

Anjum³

et al. 2022

Heliyon

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“…Waqas et al (2020) applied analytical strategy to investigate the study of radiant energy transport in viscoelastic nanofluid by means of buoyant force and convective conditions. A broad examination on the progression of nanoliquids under different thermophysical stages was introduced by many authors (Gangadhar et al, 2020;Sobhana Babu et al, 2019;Venkata Subba Rao et al, 2018;Ahmed et al, 2019b;Alamri et al, 2019;Sheikholeslami et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Entropy generation analysis of electrical magnetohydrodynamic flow of TiO₂-Cu/H₂O hybrid nanofluid with partial slip

Rao

Gireesha

Gangadhar

et al. 2021

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Purpose This paper aims to address the magnetohydrodynamic boundary layer flow of hybrid mixture across a stretching surface under the influence of electric field. Design/methodology/approach The local similarity transformations are implemented to reformulate the governing partial differential equations into coupled non-linear ordinary differential equations of higher order. The numerical solutions are obtained for the simplified governing equations with the aid of finite difference technique. Findings The velocity, temperature and entropy generation are examined thoroughly for the effects of different budding parameters related to present analysis by means of graphs. It is obtained that owing to the effect of magnetic field along with slip factor, the fluid motion slowdown. However, the flow velocity enhances for the rising estimations of an electric field which tends to resolve sticky effects. Originality/value The three-dimensional plots are drawn to understand the nature of physical quantities. To ensure the precision, the obtained solutions are compared with the existing one for certain specific conditions. A good concurrence is observed between the proposed results and previously recorded outcomes.

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A spectral relaxation method for three-dimensional MHD flow of nanofluid flow over an exponentially stretching sheet due to convective heating: an application to solar energy

Cited by 48 publications

References 35 publications

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

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

Analysis of variable mass diffusivity in Maxwell's fluid with Cattaneo-Christov and nonlinear stratification

Entropy generation analysis of electrical magnetohydrodynamic flow of TiO₂-Cu/H₂O hybrid nanofluid with partial slip

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A spectral relaxation method for three-dimensional MHD flow of nanofluid flow over an exponentially stretching sheet due to convective heating: an application to solar energy

Cited by 48 publications

References 35 publications

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

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

Analysis of variable mass diffusivity in Maxwell's fluid with Cattaneo-Christov and nonlinear stratification

Entropy generation analysis of electrical magnetohydrodynamic flow of TiO2-Cu/H2O hybrid nanofluid with partial slip

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Entropy generation analysis of electrical magnetohydrodynamic flow of TiO₂-Cu/H₂O hybrid nanofluid with partial slip