Significance of Entropy Generation and the Coriolis Force on the Three-Dimensional Non-Darcy Flow of Ethylene-Glycol Conveying Carbon Nanotubes (SWCNTs and MWCNTs)

Abstract Nanofluids based on CNTs/ethylene glycol have a potential role in contributing to industrial applications like heat exchangers, domestic refrigerator, electronics cooling, etc. The aim and novelty of the present research is to communicate the significance of the Coriolis force and Darcy-Forchheimer stretched flow of ethylene glycol (EG) conveying carbon nanotubes (CNTs) in a rotating frame. Furthermore, entropy analysis is the main focus in this study. Two types of CNTs known as multiwalled (MWCNT) and single-walled (SWCNT) carbon nanotubes are considered. Ethylene glycol (EG) is treated as the base liquid. Xue’s model is utilized for the physical aspects of specific heat, density and thermal conductivity. The heat transfer mechanism is modeled through nonlinear thermal radiation, viscous dissipation and convective condition. The governing flow problems have been computed numerically via the NDSolve method. Outcomes for single-walled and multi-walled CNTs are arranged and compared. Our findings reveal that entropy generation is accompanied by an increasing trend in the Brinkman number and temperature ratio parameter. Temperature increases with the intensification of radiative and convective variables. Moreover, the temperature gradient has marginally larger values in the case of SWCNT, when compared with MWCNT.

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Numerical simulation of nonlinear thermal radiation on the 3D flow of a couple stress Casson nanofluid due to a stretching sheet

Journal of Thermal Science and Engineering Applications ◽

10.1115/1.4049425 ◽

2020 ◽

pp. 1-28

Author(s):

P. V. Satya Narayana ◽

Tarakaramu Nainaru ◽

G. Sarojamma ◽

Isaac Lare Animasaun

Keyword(s):

Heat Transfer ◽

Couple Stress ◽

Three Dimensional ◽

Casson Fluid ◽

Industrial Applications ◽

Physical Parameters ◽

Nonlinear Thermal Radiation ◽

Scaling Analysis ◽

Nonlinear Odes ◽

Limiting Case

Abstract Little is known on the three-dimensional flow of couple stress Casson fluid conveying nanoparticles when the significance of Lorentz force, chaotic gesture of those minute particles and thermophoresis are significant. The intent of this investigation is to focus on the flow of such fluid along a horizontal surface due to dual stretching and internal heating. The dimensional nonlinear equations are reduced into a system of coupled nonlinear ODEs employing scaling analysis and later they are solved numerically. The results are discussed graphically for various emerged physical parameters through different plots. The results in the absence of stretching ratio factor indicate that the heat absorption parameter and Prandtl number accelerate the heat transfer rate. The temperature of the non- Newtonian couple stress fluid is found to be bigger than that of viscous case. It may be suggested that Casson couple stress nanofluid can be substituted for the corresponding viscous fluid in industrial applications for greater heat transfer. The outcomes are closely matched with the studies available in the literature as a limiting case.

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Investigation for squeezing flow of ethylene glycol (C2H6O2) carbon nanotubes (CNTs) in rotating stretching channel with nonlinear thermal radiation

Journal of Molecular Liquids ◽

10.1016/j.molliq.2018.04.141 ◽

2018 ◽

Vol 263 ◽

pp. 10-21 ◽

Cited By ~ 55

Author(s):

S.S. Ghadikolaei ◽

Kh. Hosseinzadeh ◽

M. Hatami ◽

D.D. Ganji ◽

M. Armin

Keyword(s):

Carbon Nanotubes ◽

Ethylene Glycol ◽

Thermal Radiation ◽

Squeezing Flow ◽

Nonlinear Thermal Radiation

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Irreversibility analysis of the three dimensional flow of carbon nanotubes due to nonlinear thermal radiation and quartic chemical reactions

Journal of Molecular Liquids ◽

10.1016/j.molliq.2018.10.149 ◽

2019 ◽

Vol 274 ◽

pp. 379-392 ◽

Cited By ~ 36

Author(s):

Rakesh Kumar ◽

Ravinder Kumar ◽

M. Sheikholeslami ◽

Ali J. Chamkha

Keyword(s):

Carbon Nanotubes ◽

Thermal Radiation ◽

Chemical Reactions ◽

Three Dimensional ◽

Nonlinear Thermal Radiation ◽

Three Dimensional Flow ◽

Dimensional Flow

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Entropy Generation and Activation Energy Impact on Radiative Flow of Viscous Fluid in Presence of Binary Chemical Reaction

International Journal of Chemical Reactor Engineering ◽

10.1515/ijcre-2018-0045 ◽

2018 ◽

Vol 16 (9) ◽

Cited By ~ 2

Author(s):

M. Ijaz Khan ◽

Salman Ahmad ◽

T. Hayat ◽

A. Alsaedi

Keyword(s):

Activation Energy ◽

Thermal Radiation ◽

Entropy Generation ◽

Concentration Gradient ◽

Three Dimensional ◽

Entropy Generation Rate ◽

Bejan Number ◽

Nonlinear Thermal Radiation ◽

Main Theme ◽

Parallel Plates

Abstract The main theme of this paper is to investigate entropy generation analysis for unsteady three-dimensional flow of viscous (Newtonian) fluid between two horizontal parallel plates. Lower plate is porous and stretching while upper plate squeezed downward. Further effects of nonlinear thermal radiation, viscous dissipation, heat source/sink and activation energy are accounted. Entropy generation rate calculated in terms of thermal radiation, fluid diffusion and fluid friction. Transformations procedure used lead to reduction of PDE’s into ordinary ones. Built-in-Shooting technique is used for the computational analysis. Impacts of different flow variables on temperature, velocity, concentration, volumetric entropy generation and Bejan number are discussed and presented through graphs. Temperature and concentration gradient are discussed numerically. It is examined from obtained results that velocity of liquid particle decays through larger estimation of squeezing parameter. It is also examined that temperature distribution enhances for higher estimation of radiative heat flux. Moreover temperature and concentration gradient increase for larger squeezing parameter.

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Darcy–Forchheimer three-dimensional flow of carbon nanotubes with nonlinear thermal radiation

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-019-09016-8 ◽

2019 ◽

Vol 140 (6) ◽

pp. 2711-2720 ◽

Cited By ~ 3

Author(s):

Tasawar Hayat ◽

Farwa Haider ◽

Taseer Muhammad ◽

Ahmed Alsaedi

Keyword(s):

Carbon Nanotubes ◽

Thermal Radiation ◽

Three Dimensional ◽

Nonlinear Thermal Radiation ◽

Three Dimensional Flow ◽

Dimensional Flow

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Numerical Simulation of 3D Condensation Nanofluid Film Flow with Carbon Nanotubes on an Inclined Rotating Disk

Applied Sciences ◽

10.3390/app10010168 ◽

2019 ◽

Vol 10 (1) ◽

pp. 168 ◽

Cited By ~ 3

Author(s):

Muhammad Ramzan ◽

Saima Riasat ◽

Seifedine Kadry ◽

Chhaihuoy Long ◽

Yunyoung Nam ◽

...

Keyword(s):

Carbon Nanotubes ◽

Thermal Radiation ◽

Film Flow ◽

Three Dimensional ◽

Rotating Disk ◽

Nonlinear Thermal Radiation ◽

Thin Film Flow ◽

Similarity Transformations ◽

High Concordance ◽

First Time

Here, we discuss three-dimensional dusty nanofluid thin film flow with nonlinear thermal radiation, where carbon nanotubes flow past an inclined rotating disk with a constant angular velocity of Ω. This novel mathematical model is unique and is discussed here for the first time. Downward draining flow and lateral flow arise due to inclination. The demonstrated geometry is characterized in terms of time-independent continuity, momentum, and energy balance. Similarity transformations convert the partial differential equation into a system of ordinary differential equations. The obtained equations are analyzed numerically using the bvp4c MATLAB function. The thermal field of the dust phase was smaller than that of the nanofluid phase, and this difference was exacerbated by increasing the thermal radiation. To validate the model presented here, it is compared to a previous model; the models showed high concordance.

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Physical aspects of Darcy-Forchheimer bidirectional flow in carbon nanotubes (SWCNTs and MWCNTs)

International Journal of Numerical Methods for Heat &amp Fluid Flow ◽

10.1108/hff-12-2018-0770 ◽

2019 ◽

Vol 29 (6) ◽

pp. 2032-2056 ◽

Cited By ~ 11

Author(s):

Muhammad Ijaz Khan ◽

Madiha Rashid ◽

Tasawar Hayat ◽

Niaz B. Khan ◽

Ahmed Alsaedi

Keyword(s):

Carbon Nanotubes ◽

Porous Medium ◽

Three Dimensional ◽

Stretching Surface ◽

Optimal Homotopy Analysis Method ◽

Content Type ◽

Heterogeneous Effects ◽

Swcnts And Mwcnts ◽

Nonlinearly Stretching Surface ◽

Walled Cnts

Purpose This paper aims to examine the three-dimensional (3D) flow of carbon nanotubes (CNTs) due to bidirectional nonlinearly stretching surface by considering porous medium. Characteristics of both single-walled CNTs and multi-walled CNTs are discussed by considering Xue model. Darcy–Forchheimer model is used for flow saturating porous medium. Design/methodology/approach Optimal homotopy analysis method is used for the development of series solutions. Findings The authors deal with 3D Darcy–Forchheimer flow of CNTs over a nonlinearly stretching surface. Heat transport mechanism is discussed in the presence of Xue model. The homogeneous and heterogeneous effects are also accounted. The mathematical modeling is computed using boundary-layer approximations. Originality/value No such work has been done yet in the literature.

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