Rayleigh and Nusselt
Experimental Investigation of the Heat Source Orientation on the Transient Flow and Thermal Behaviour of Phase Change Material During Phase Transition
... The calculated Nusselt and Rayleigh numbers further highlight the underlying physical behaviors that occurred during the melt. The Nusselt number emphasised the three primary [r] ...
110
HEAT TRANSFER INTENSIFICATION IN A 3D CAVITY USING HYBRID CNT-AL2O3 (15-85%) NANOFLUID
... Figure 7 presents the variation of Average Nusselt number versus nanoparticles volume fraction for different Rayleigh numbers. For all Ra values, the variation is quasi-linear and the heat transfer ...
6
Effect of Buoyancy Force on the Flow Field in a Square Cavity with Heated from Below
... Abstract: In this paper, the effect of buoyancy force in a square enclosure is studied numerically. The coupled equations of continuity, momentum and energy are solved by a finite difference method. The SIMPLE algorithm ...
5
Numerical Simulation of Two Dimensional Natural Convection in a Confined Environment with the Vorticity Stream Function Formulation
... local Nusselt numbers for various grid sizes are presented to develop an understanding of the grid fineness that is necessary for accurate numerical ...local Nusselt number from Ra = 1000 to Ra = 1,000,000. ...
15
Air cooling of electronic components in partially top vented enclosures
... modified Rayleigh number is considered, the tests are conducted for three modified Rayleigh numbers at ...averaged Nusselt number between grid (37×31×61) and grid (95×31×91) is ...row-averaged ...
11
Numerical Analysis of Natural Convection of Nano Fluids on Square Enclosures
... average Nusselt number of the base fluid by the present numerical simulation and with Prediction of Heat Transfer Coefficient, Nu, as function of Rayleigh number in Rayleigh-Bénard natural convection ...
6
INVESTIGATION OF EFFECTIVE PARAMETERS ON ENTROPY GENERATION IN A SQUARE ELECTRONIC PACKAGE
... of Rayleigh number on flow and temperature field in different geometric conditions for air and ...local Nusselt number using lattice Boltzmann numerical ...
7
MODELING OF FREE CONVECTION HEAT TRANSFER UTILIZING NANOFLUID INSIDE A WAVY ENCLOSURE WITH A PAIR OF HOT AND COLD CYLINDERS
... The aim of this study is to explore the heat transfer rate of natural convection heat transfer of nanofluid (Cu-water) in a wavy-wall enclosure. The first case under investigation is characterized the numerical models ...
10
Effect of the insulation by the mud on the convection in building in the Sahara of Algeria - case of Bechar City
... local Nusselt number is presented in Figure 19, it is clear that it becomes important for every increase of Rayleigh because of the change in the exchange ratio between the wall and the air, a difference of ...
7
NUMERICAL ANALYSIS OF NATURAL CONVECTION IN A RIGHT-ANGLE TRIANGULAR ENCLOSURE
... A numerical investigation has been performed for heat transfer analysis in a right-angled triangular enclosure filled with water. The side wall of the enclosure is maintained at high temperature compare to the base wall ...
8
Effect on Nusselt Number and Friction Factor by Variation in Roughness Geometry A Review
... Sahu and Bhagoria experimentally investigated with transverse broken ribs roughness geometry in solar air heater. Parameters used for study were roughness pitch (p) of 10 mm to 30 mm, roughness height (e) of ribs as 1.5 ...
8
An Investigation into Forced Convection Heat Transfer through Porous Media
... Theoretical and experimental investigations of forced convection heat transfer from a heated flat plate embedded in porous media with a constant heat flux had been carried out in the present work. The experimental ...
8
Effect of Surface Tension on Single Mode Nonlinear Rayleigh -Taylor Instability
... In this section, we analytically and numerically investigate the nonlinear behavior of a planar interface in Rayleigh Taylor instability in presence of vorticity. We also consider the stability of Rayleigh ...
10
DOUBLE DIFUSION EFFECTS ON CONVECTION IN FLOW ON VERTICAL PLATE IMBEDDED IN A POROUS MEDIA
... of Nusselt Sherwood numbers according to Dufour and Soret ...the Nusselt number increases with increasing Dufour number, whereas for its lower values, Nu decreases with increasing the number of ...the ...
6
Experimental Estimation of Temporal and Spatial Resolution of Coefficient of Heat Transfer in a Channel Using Inverse Heat Transfer Method
... the Nusselt number reduces until the flow (thermal and hydrodynamic) is fully developed. At this time, the heat transfer coefficient does not change with 𝑥 and is constant. During the two phase flow, the ...
34
Spectral properties of unbounded J-self-adjoint block operator matrices
... classical Rayleigh quotient we use either a functional that is connected with the quadratic numerical range (see Theorem ...generalised Rayleigh functional that is associated with the Schur complement of ...
37
Heat Transfer Enhancement in a Tube using Plain Fin & Twisted Tape Inserts
... number, Nusselt number and friction factor without twisted tape The following reading has been taken without inserting the twisted tape into the ...number, Nusselt number and friction factor have been ...
6
Heat Transfer Enhancement In Pipe With Passive Enhancement Technique
... that Nusselt number increases with increase of Reynolds number, Nusselt number obtained for tube with helical wire insert was more than that of plain tube and heat transfer rate is higher for tube fitted ...
6
Examination of the Local and Fluctuating Heat Transfer due to Swirling Jets Impinging upon a Heated Horizontal Surface
... As discussed previously, the aim of this study is to evaluate the effect a swirling impinging jet has on the convective heat transfer from a heated surface when compared to a normal impinging jet of the same external ...
12
Numerical Study of Hydro-Magnetic Nanofluid Mixed Convection in a Square Lid-Driven Cavity Heated From Top and Cooled From Bottom
... ….To study the grid independence examination, the numerical procedure is carried out for different grid resolutions. The grids sensitivity analysis is performed for Re=100 ,Gr=10 , = 0.05 and Ha=0 .Table 2 indicates the ...
14