Numerical study on the effects of geometrical parameters and Reynolds number on the heat transfer behavior of carboxy-methyl cellulose/CuO non-Newtonian nanofluid inside a rectangular microchannel

2020 ◽  
Author(s):  
Mehdi Miansari ◽  
Hossein Aghajani ◽  
Majid Zarringhalam ◽  
Davood Toghraie
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Numerical Study ◽  
Methyl Cellulose ◽  
Geometrical Parameters ◽  
Carboxy Methyl Cellulose ◽  
Rectangular Microchannel ◽  
Heat Transfer Behavior ◽  
Transfer Behavior ◽  
Carboxy Methyl

Slip velocity and temperature jump of a non-Newtonian nanofluid, aqueous solution of carboxy-methyl cellulose/aluminum oxide nanoparticles, through a microtube

2019 ◽  
Vol 29 (5) ◽  
pp. 1606-1628 ◽  
Author(s):  
Marjan Goodarzi ◽  
Saeed Javid ◽  
Ali Sajadifar ◽  
Mehdi Nojoomizadeh ◽  
Seyed Hossein Motaharipour ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Aqueous Solution ◽  
Aluminum Oxide ◽  
Temperature Jump ◽  
Methyl Cellulose ◽  
Oxide Nanoparticles ◽  
Carboxy Methyl Cellulose ◽  
Aluminum Oxide Nanoparticles ◽  
Content Type ◽  
Carboxy Methyl

Purpose With respect to two new subjects, i.e. nanofluids and microchannels, in heat transfer systems and modern techniques used for building them, this paper aims to study on effect of using aluminum oxide nanoparticles in non-Newtonian fluid of aqueous solution of carboxy-methyl cellulose in microtube and through application of different slip coefficients to achieve various qualities on surface of microtube. Design/methodology/approach Simultaneously, the effect of presence of nanoparticles and phenomenon of slip and temperature jump has been explored in non-Newtonian nanofluid in this essay. The assumption of homogeneity of nanofluid and fixed temperature of wall in microtube has been used in modeling processes. Findings The results have been presented as diagrams of velocity, temperature and Nusselt Number and the investigations have indicated that addition of nanoparticles to the base fluid and increase in microtube slip coefficient might improve rate of heat transfer in microtube. Originality/value The flow of non-Newtonian nanofluid of aqueous solution of carboxy methyl cellulose-aluminum oxide has been determined in a microtube for the first time.

Numerical study on flow and heat transfer behavior of vortex and film composite cooling

2018 ◽  
Vol 32 (6) ◽  
pp. 2905-2917 ◽  
Author(s):  
Liang Li ◽  
Changhe Du ◽  
Xiuxiu Chen ◽  
Jiefeng Wang ◽  
Xiaojun Fan
Keyword(s):  
Heat Transfer ◽  
Numerical Study ◽  
Film Composite ◽  
Flow And Heat Transfer ◽  
Heat Transfer Behavior ◽  
Transfer Behavior

Heat Transfer Behavior of Aqueous Suspensions of Nano-Diamonds in Turbulent Pipe Flow

2008 ◽  
Author(s):  
Shuichi Torii ◽  
Wen-Jie Yang
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Heat Transfer Performance ◽  
Turbulent Pipe Flow ◽  
Working Fluid ◽  
Transfer Performance ◽  
Aqueous Suspensions ◽  
Heat Transfer Behavior ◽  
Diamond Particles ◽  
Transfer Behavior

This paper aims to study the convective heat transfer behavior of aqueous suspensions of nano-diamond particles flowing through a horizontal tube heated under constant heat flux condition. Consideration is given to the effect of particle concentration and Reynolds number on heat transfer enhancement. It is found that (i) significant enhancement of heat transfer performance due to suspension of nano-diamond particles in the circular tube flow is observed in comparison with pure water as the working fluid, (ii) the enhancement is intensified with an increase in the Reynolds number and the nano-diamond concentration, and (iii) substantial amplification of heat transfer performance is not attributed purely to the enhancement of thermal conductivity due to suspension of nano-diamond particles.

Entropy generation and heat transfer analysis for ferrofluid flow between two rotating disks with variable conductivity

2021 ◽  
pp. 095440622199118
Author(s):  
Anupam Bhandari
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Differential Equations ◽  
Entropy Generation ◽  
Heat Transfer Analysis ◽  
Entropy Generation Rate ◽  
Geometrical Parameters ◽  
Rotating Disks ◽  
Coupled Differential Equations ◽  
Lower Disk

Present model analyze the flow and heat transfer of water-based carbon nanotubes (CNTs) [Formula: see text] ferrofluid flow between two radially stretchable rotating disks in the presence of a uniform magnetic field. A study for entropy generation analysis is carried out to measure the irreversibility of the system. Using similarity transformation, the governing equations in the model are transformed into a set of nonlinear coupled differential equations in non-dimensional form. The nonlinear coupled differential equations are solved numerically through the finite element method. Variable viscosity, variable thermal conductivity, thermal radiation, and volume concentration have a crucial role in heat transfer enhancement. The results for the entropy generation rate, velocity distributions, and temperature distribution are graphically presented in the presence of physical and geometrical parameters of the flow. Increasing the values of ferromagnetic interaction number, Reynolds number, and temperature-dependent viscosity enhances the skin friction coefficients on the surface and wall of the lower disk. The local heat transfer rate near the lower disk is reduced in the presence of Harman number, Reynolds number, and Prandtl number. The ferrohydrodynamic flow between two rotating disks might be useful to optimize the use of hybrid nanofluid for liquid seals in rotating machinery.

Sign in / Sign up

Export Citation Format

Share Document