Results 141 to 150 of about 8,364 (191)

A New Nusselt Number for Complicated Configurations

Volume 3: Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat Transfer in Electronic Equipment; Symposium in Honor of Professor Richard Goldstein; Symposium in Honor of Prof. Spalding; Symposium in Honor of Prof. Arthur E. Bergles, 2013
Convective heat transfer over surfaces is generally presented in the form of the heat-transfer coefficient (h) or its nondimensional form, the Nusselt number (Nu). Both require the specification of the free-stream temperature (Too) or the bulk (Tb) temperature, which are clearly defined only for simple configurations.
Tom I-Ping Shih, Srisudarshan Krishna Sathyanarayanan   +1 more
openaire   +1 more source

Nusselt number of a sphere in creeping flow

International Communications in Heat and Mass Transfer, 1990
Abstract Rates of heat or mass transfer from a spherical droplet translating in a field under creeping flow conditions are examined. The existing expressions for Nusselt numbers are evaluated via an independent numerical analysis.
R.W. Ghrist, D.L.R. Oliver
openaire   +1 more source

On the Monotonicity of the Nusselt Number as a Function of the Peclet Number

SIAM Journal on Applied Mathematics, 1994
Summary: The author considers an arbitrarily shaped body of finite extent that is kept at a constant temperature and immersed in an infinitely large fluid bath. If the temperature on the body is greater than the ambient temperature of the fluid, it is shown that the heat necessary to keep the body temperature fixed is a monotonically increasing ...
openaire   +2 more sources

Nusselt number correlation for synthetic jets

Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2015
Among its many applications, synthetic jets have received much consideration as devices with the ability to enhance or even replace more conventional forced convection cooling techniques. This enhanced cooling is a result of the increase in turbulent mixing brought about by the oscillatory nature of the jet.
M. V. Lehnen, C. Y. Y. Lee, F. L. D. Alves   +2 more
openaire   +1 more source

Rayleigh–Bénard convection: Improved bounds on the Nusselt number

Journal of Mathematical Physics, 2011
We consider Rayleigh–Bénard convection as modelled by the Boussinesq equations in the infinite-Prandtl-number limit. We are interested in the scaling of the average upward heat transport, the Nusselt number Nu, in terms of the non-dimensionalized temperature forcing, the Rayleigh number Ra.
Otto, Felix, Seis, Christian
openaire   +2 more sources

Physical model of the dependence of the Nusselt number on the Rayleigh number

Technical Physics, 2016
The dependence of the Nusselt number on the Rayleigh number at the stage preceding the turbulent regime of convection is substantiated and obtained in analytic form. At this stage, the Nusselt number can be described by the power dependence on the Rayleigh number, which contains five constants.
O. L. Patochkina, Yu. G. Kazarinov, V. I. Tkachenko   +2 more
openaire   +1 more source

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
openaire   +2 more sources

Limit value of the Nusselt number for particles of different shape

International Journal of Heat and Mass Transfer, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wadewitz, Antje, Specht, Eckehard
openaire   +2 more sources

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 ...
openaire   +1 more source

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.
De-Yi Shang, Liang-Cai Zhong
openaire   +1 more source