Results 231 to 240 of about 49,718 (278)

Prandtl number dependence of Nusselt number in direct numerical simulations

Journal of Fluid Mechanics, 2000
The dependence of the Nusselt number Nu on the Rayleigh Ra and Prandtl Pr number is determined for 104 < Ra < 107 and 0.07 < Pr < 7 using DNS with no-slip upper and lower boundaries and free-slip sidewalls in a 8 × 8 × 2 box. Nusselt numbers, velocity scales and boundary layer thicknesses are calculated.
Robert M. Kerr, Jackson R. Herring
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A study of Nusselt and Sherwood numbers in a monolith reactor

Catalysis Today, 1999
Abstract A two-dimensional model of a single channel of a monolith reactor is used to evaluate the values of the Nusselt and Sherwood numbers under reaction conditions. The circular channel is assumed to have axisymmetry with a first-order reaction occurring at the wall.
Robert E. Hayes, Stan T. Kolaczkowski
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Nusselt Number Correlations

2015
It can be argued that the exchange of energy between a solid and a fluid is important in most, if not virtually all, practical situations for which heat transfer plays a role. The goal of this chapter is to determine the convective heat transfer coefficients between the coffee and the mug and between the mug and ambient that have been used in the ...
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Drop Nusselt numbers in dropwise condensation

Applied Scientific Research, 1974
Most of the theoretical studies in dropwise condensation have based their analysis on the principle that the heat transfer rate limiting mechanism in dropwise condensation is the conduction of heat through drops. Based on this principle, Fatica and Katz presented shape factor values for droplets and these values have been used by other studies.
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A New Correlation of Nusselt Number for Impinging Jets

Heat Transfer Engineering, 2009
Jet impingement heat transfer has received a remarkable amount of attention by researchers throughout the world for many years due to widespread interest from both academic and industrial points of view. However, the fluid dynamics involved with arrays of jets are very complex and still not completely understood. Therefore, a functional relationship of
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Effects of outlet area on the Nusselt number of the solar chimney

AIP Conference Proceedings, 2021
Solar chimney has been applied widely in many aspects, such as civil engineering and building physics and demonstrated to be a good solution for natural ventilation of dwellings. It uses absorbed solar radiation to create stack effect which induces air flow and increases ventilation of building.
T. N. Huynh, Y. Q. Nguyen
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The developing Nusselt numbers for slug flow in rectangular ducts

International Journal of Heat and Mass Transfer, 1998
Abstract A rigorous solution is obtained for the 3-D temperature field in the thermal entrance region of rectangular ducts, for Newtonian fluids in slug flow, with constant wall heat flux and fluid longitudinal heat flux (H2 boundary conditions). The solution is presented as a series of the transverse Cartesian co-ordinates, where the coefficients ...
SPIGA, Marco, MORINI G. L.
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Procedure for Optimal Formalization of Nusselt Number

2016
Theoretical equations of Nusselt number are derived out based on our innovative similarity transformation model. Such theoretical equations show that the wall similarity temperature gradient is the only one unknown variable dominating the evaluation of the Nusselt number.
Liang-Cai Zhong, De-Yi Shang
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Nusselt Number Measurements for Turbulent Rayleigh-Bénard Convection

Physical Review Letters, 2003
We present high-precision measurements of the Nusselt number N as a function of the Rayleigh number R for a cylindrical sample of water (Prandtl number sigma=4.4) of height L approximately equal to 50 cm and aspect ratio Gamma identical with D/L approximately equal to 1 (D is the diameter) for 3 x 10(9)< or =R< or =6 x 10(10).
Alexei Nikolaenko, Guenter Ahlers
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Nusselt number for steady Poiseiulle flow through a pipe

Mechanics Research Communications, 1994
Abstract The efficiency of the heat transfer mechanism for the fully developed steady Poiseiulle flow of a viscus incompressible fluid through a pipe of uniform but arbitrary cross section, when the wall of the pipe is maintained at a constant temperature, is measured by the average Nusselt number Nu .
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