Effects of Surface Radiation on the Unsteady Natural Convection in a Rectangular Enclosure

the effects of changing roughness on the flow structure in the bends

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

1be Effect of Partial Baffles on Natural Convection in an Inclined Rectangular Enclosure

Complete partitioning wilb boneyoomb-Iike struetuIes bas previously been proposed to reduce heat transfer by natural convection. at the expense of direct oonduction through the Struet\I.fe. in Ihe thin rectangular enclosures used for solar colleclors. 11tis paper presents the results of a sludy of the use of partial ballles for this purpose. 1be heat transfer rate was measured in glycerol using...

Natural Convection Heat Transfer from a Rectangular Block Embedded in a Vertical Enclosure

Natural Convection in a Tilted Rectangular Enclosure with a Single Discrete Heater

The effect of inclination angle on the steady laminar free convection in a rectangular enclosure (aspect ratio = 5), which is discretely heated by an isoflux flush mounted small heater (L / H = 0.125) is studied numerically. The local and average Nusselt numbers are compared at inclination angles from 0 (bottom heating) to 180o (top heating), for modified Rayleigh numbers 102 ≤ Ra* ≤ 106. The t...

Numerical study of fins arrangement and nanofluids effects on three-dimensional natural convection in the cubical enclosure

This investigation is a three dimensional comprehensive heat transfer analysis for partially differentially heated enclosure with the vertical fin mounted on the hot wall. The thermal lattice Boltzmann based on D3Q19 method is utilized to illustrate the effects of vertical fins and nanoparticles on the flow and thermal fields. The effects of Rayleigh number and different arrangement of fins on ...