Prediction of turbulent forced convection of a nanofluid in a tube with uniform heat flux using a two phase approach

2007 ◽  
Vol 28 (2) ◽  
pp. 211-219 ◽  
Author(s):  
A. Behzadmehr ◽  
M. Saffar-Avval ◽  
N. Galanis
Keyword(s):  
Heat Flux ◽  
Forced Convection ◽  
Uniform Heat Flux ◽  
Two Phase ◽  
Phase Approach ◽  
Uniform Heat

A Nondimensional Analysis of Boiling Dry a Vertical Channel with a Uniform Heat Flux

1981 ◽  
Vol 103 (4) ◽  
pp. 667-672 ◽  
Author(s):  
K. H. Sun ◽  
R. B. Duffey ◽  
C. Lin
Keyword(s):  
Heat Flux ◽  
Nuclear Power ◽  
Closed Form Solution ◽  
Vertical Channel ◽  
Form Solution ◽  
Uniform Heat Flux ◽  
Two Phase ◽  
Drift Flux ◽  
Rod Bundle ◽  
Uniform Heat

A thermal-hydraulic model has been developed for describing the phenomenon of hydrodynamically-controlled dryout, or the boil-off phenomenon, in a vertical channel with a spatially-averaged or uniform heat flux. The use of the drift flux correlation for the void fraction profile, along with mass and energy balances for the system, leads to a dimensionless closed-form solution for the predictions of two-phase mixture levels and collapsed liquid levels. The physical significance of the governing dimensionless parameters are discussed. Comparisons with data from single-tube experiments, a 3 × 3 rod bundle experiment, and the Three Mile Island nuclear power plant show good agreement.

Uniform suction/blowing effect on forced convection about a wedge: Uniform heat flux

1998 ◽  
Vol 128 (3-4) ◽  
pp. 173-181 ◽  
Author(s):  
K. A. Yih
Keyword(s):  
Heat Flux ◽  
Forced Convection ◽  
Uniform Heat Flux ◽  
Uniform Suction ◽  
Uniform Heat

scholarly journals Two-phase flow pattern and heat transfer coefficients of R245fa/R134a under non-uniform heat flux

2019 ◽  
Vol 65 (17) ◽  
pp. 1741-1751
Author(s):  
Yani Lu ◽  
Li Zhao ◽  
Shuai Deng ◽  
Dongpeng Zhao ◽  
Xianhua Nie ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Flow Pattern ◽  
Two Phase Flow ◽  
Uniform Heat Flux ◽  
Phase Flow ◽  
Transfer Coefficients ◽  
Two Phase ◽  
Heat Transfer Coefficients ◽  
Uniform Heat

scholarly journals Combined free and forced convection in a horizontal tube under uniform heat flux

Solar Energy ◽  
1969 ◽  
Vol 12 (4) ◽  
pp. 439-446 ◽  
Author(s):  
A. Kupper ◽  
E.G. Hauptmann ◽  
M. Iqbal
Keyword(s):  
Heat Flux ◽  
Forced Convection ◽  
Horizontal Tube ◽  
Uniform Heat Flux ◽  
Uniform Heat ◽  
Free And Forced Convection

Numerical Investigation on Viscous Dissipation Effect in Forced Convection in Rectangular Microchannels With Nanofluids

2016 ◽  
Author(s):  
Bernardo Buonomo ◽  
Luca Cirillo ◽  
Davide Ercole ◽  
Oronzio Manca ◽  
Sergio Nardini
Keyword(s):  
Heat Flux ◽  
Numerical Investigation ◽  
Forced Convection ◽  
Viscous Dissipation ◽  
Convection Flow ◽  
Uniform Heat Flux ◽  
Inlet Section ◽  
Transfer Coefficients ◽  
Rectangular Microchannel ◽  
Uniform Heat

In this paper a numerical investigation on laminar forced convection flow of a water-Al2O3 nanofluid in a rectangular microchannel, taking into account the viscous dissipation, is accomplished. A constant and uniform heat flux on the external surfaces has been applied and a single-phase model approach has been employed. The analysis has been performed in steady state regime for particle size in nanofluids equal to 38 nm. The CFD commercial code Ansys-Fluent has been employed in order to solve the 3-D numerical model. The geometrical configuration under consideration consists in a duct with a rectangular shaped crossing area. A steady laminar incompressible flow with viscous dissipation and different nanoparticle volume fractions has been considered. The base fluid is water and nanoparticles are made up of alumina (Al2O3). Thermo-physical properties of the nanofluid are considered constant with temperature. The length the edge and height of the duct are 0.030 m, 1.7 × 10−7 and 1.1 × 10−7 m, respectively. A constant and uniform heat flux q on the top wall is applied, the others are adiabatic and at the inlet section uniform temperature and velocity profiles are assumed. The results showed the increase of the convective heat transfer coefficients, in particular, for high concentration of nanoparticles and for increasing values of Reynolds number. However, the disadvantages are represented by the growth of the wall shear stress and the required pumping power, observed in particular, at high particle concentrations.

Investigation on the temperature distribution in the two-phase spider netted microchannel network heat sink with non-uniform heat flux

2021 ◽  
Vol 169 ◽  
pp. 107079
Author(s):  
Hui Tan ◽  
Pingan Du ◽  
Kuan Zong ◽  
Guangyao Meng ◽  
Xin Gao ◽  
...  
Keyword(s):  
Heat Flux ◽  
Temperature Distribution ◽  
Heat Sink ◽  
Uniform Heat Flux ◽  
Two Phase ◽  
Uniform Heat
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