Enhanced Heat Transfer in Moderately Ionized Liquid Due to Hybrid MoS2/SiO2 Nanofluids Exposed by Nonlinear Radiation: Stability Analysis

Crystals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 142 ◽  
Author(s):  
Umair Khan ◽  
A. Zaib ◽  
Ilyas Khan ◽  
Dumitru Baleanu ◽  
Kottakkaran Sooppy Nisar
Keyword(s):  
Heat Transfer ◽  
Ethylene Glycol ◽  
Silicon Oxide ◽  
Strain Tensor ◽  
Boundary Layer Separation ◽  
Radiation Stability ◽  
Weissenberg Number ◽  
Nonlinear Radiation ◽  
Reliable Solution ◽  
The Impact

This study considers ethylene-glycol as a moderate ionized regular liquid whose rheological behavior can be analyzed through the relations of the Carreau stress–strain tensor. Hybrid nanoliquids are potent liquids that give better performance for heat transfer and the properties of thermo physical than regular heat transfer liquids (water, ethylene glycol, and oil) and nanoliquids by single nanomaterials. Here, a type of hybrid nanoliquid involving silicon oxide (SiO2) and Molybdenum disulfide (MoS2) nanoparticles with ethylene glycol as a base liquid are considered. In addition, the impact of nonlinear radiation along with Lorentz force is invoked. Similarity variables are utilized to acquire the numerical findings and their solutions for transmuting ordinary differential equations (ODEs). Using bvp4c from MATLAB, we can obtain these quantitative and numerical results of the converted nonlinear equations. The impacts of the pertinent constraints on the temperature distribution, velocity, Nusselt number, and skin friction are estimated. The outcomes indicate that the double-edged methods for the results originate from the precise values of the permeable parameters. Further, the critical values (Sc = 1.9699, 2.0700 and 2.2370) are enhanced due to the influence of the local Weissenberg number. This implies that the increasing value of the local Weissenberg number accelerate the boundary layer separation. Furthermore, a stability investigation is performed and confirms that the first solution is a physically reliable solution.

The Impact of Viscous Dissipation on the Thin Film Unsteady Flow of GO-EG/GO-W Nanofluids

Mathematics ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 653 ◽  
Author(s):  
Ali Rehman ◽  
Zabidin Salleh ◽  
Taza Gul ◽  
Zafar Zaheer
Keyword(s):  
Heat Transfer ◽  
Graphene Oxide ◽  
Ethylene Glycol ◽  
Unsteady Flow ◽  
Heat Transfer Enhancement ◽  
Nonlinear Differential Equations ◽  
Physical Parameters ◽  
Transfer Enhancement ◽  
Flexible Surface ◽  
The Impact

The unsteady flow of nanoliquid film over a flexible surface has been inspected. Water and ethylene glycol are used as the base liquids for the graphene oxide platelets. The comparison of two sorts of nanoliquids has been used for heat transfer enhancement applications. The thickness of the nanoliquid film is kept as a variable. The governing equations for the flow problem have been altered into the set of nonlinear differential equations. The BVP 2.0 package has been used for the solution of the problem. The sum of the square residual error has been calculated up to the 10th order approximations. It has been observed that the graphene oxide ethylene glycol based nanofluid (GO-EG) is more efficient for heat transfer enhancement as compared to the graphene oxide water based nanofluid (GO-W). The impact of the physical parameters has been plotted and discussed.

scholarly journals MHD Slip Flow and Heat Transfer of Cu-Fe3O4/ Ethylene Glycol-Based Hybrid Nanofluid over a Stretching Surface

2020 ◽  
Vol 11 (4) ◽  
pp. 11956-11968
Keyword(s):  
Heat Transfer ◽  
Ethylene Glycol ◽  
Slip Flow ◽  
Tangential Velocity ◽  
Hybrid Nanoparticles ◽  
Partial Slip ◽  
Design Parameters ◽  
Hybrid Nanofluid ◽  
Stretching Surface ◽  
The Impact

In this article, the impact of hybrid nanoparticles on different physical quantities in a Cu-Fe3O4/ethylene glycol-based hybrid nanofluid is associated with a steady and fully developed natural convective flow over a stretching surface. The investigation's significant results are that the ferrous oxide/ethylene glycol-based hybrid nanofluid enlarged with partial slip parameter undermines the tangential velocity and liquid suction. It causes a minute radial velocity along with temperature distribution through a stretching surface. The analysis is presented in dimensionless form. The transformed equations are solved numerically using Fourth order R-K Fehlberg with shooting technique. It is a phenomenon found in a mixture of mobile particles that exhibit specific responses to temperature strength. The particle moves to the hot clod region in thermal diffusion; then it is called ’‘positive'; otherwise, it is called ’‘negative'. The consequences of this investigation are of significance with evaluating the impact of some essential design parameters on heat transfer and, therefore, in the enhancement of industrial processes.

scholarly journals Mixed Convection and Thermally Radiative Flow of MHD Williamson Nanofluid with Arrhenius Activation Energy and Cattaneo–Christov Heat-Mass Flux

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
S. Eswaramoorthi ◽  
Nazek Alessa ◽  
M. Sangeethavaanee ◽  
Safak Kayikci ◽  
Ngawang Namgyel
Keyword(s):  
Heat Transfer ◽  
Activation Energy ◽  
Mass Flux ◽  
Thermal Characteristics ◽  
Mhd Flow ◽  
Weissenberg Number ◽  
Fluid Temperature ◽  
Ode Models ◽  
Arrhenius Function ◽  
The Impact

In this paper, we explored the impact of thermally radiative MHD flow of Williamson nanofluid over a stretchy plate. The flow in a stretchy plate is saturated via Darcy–Forchheimer relation. Cattaneo–Christov heat-mass flux theory is adopted to frame the energy and nanoparticle concentration equations. Additionally, the mass transfer analysis is made by activation energy and binary chemical reaction. Activation energy is invoked through the modified Arrhenius function. The intention of the current investigation is to enhance the heat transfer rate in industrial processes. The non-Newtonian nanofluids have more prominent thermal characteristics compared to ordinary working fluids. The governing models are altered into ODE models, and these models are numerically solved by applying the MATLAB bvp4c algorithm. The graphical and tabular interpretations have scrutinized the impact of sundry distinct parameters. The fluid speed escalates for enhancing the Richardson number, and it falls off for higher values of the Weissenberg number. It is noticed that the fluid temperature declines for higher values of the Brownian motion parameter and it grows for larger values of the thermophoresis parameter. The activation energy enriches the heat transfer gradient and suppresses the local Sherwood number. Additionally, the more significant heat transfer gradient occurs in heat-absorbing nonradiative viscous nanofluid and a smaller heat transfer gradient occurs in heat-generating radiative Williamson nanofluid. Also, we noticed that a higher heat transfer gradient appears in the Fourier model than in the Catteneo–Christov model. In addition, the comparative results are confirmed and reached an outstanding accord.

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

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