[PDF] Top 20 A Study of Numerical Modeling of Heat Transfer in Wall-Adjacent Turbulent Flows

... convective heat transport to or from a rigid surface, the flow in the vicinity of the body is in turbulent ...that turbulent velocity fluctuations vanish. But, at the wall, the diffusive ... See full document

... In this study, a finite volume analysis is used to serve as a method of solution for the problem under investigation. Initially, a mesh of 40×40 elements is tested. The SIMPLE algorithm, reported by Versteeg and ... See full document

... layer flows over concave surfaces are caused by the imbalance between centrifugal effects and radial pressure ...to turbulent flow, and thereby achieve a reduced frictional ...the wall shear stress ... See full document

... fine numerical grid is ...and turbulent quantities, and their variations, which can be substantial in the vicinity of the ...the wall and the spacing in the turbulent region may need to be ... See full document

... we study numerically the turbulent transport o f passive scalars in a flume by directly solving unsteady, three-dimensional Navier-Stokes equations and the energy equation for thermal ...f wall ... See full document

... the wall-adjacent layer thermal conductivity is ...particles adjacent to a wall has been studied for static beds of particles (for example[25], [44], ...the heat transfer to ... See full document

... This study was first numerically used in Gambit software, version ...tube wall; therefore, the software automatically introduces the tube as tube ...a turbulent flow change the Reynolds ... See full document

... the turbulent kinetic energy increases with increase of the Reynolds number and its main reason will be increase of velocity and ...convective heat transfer coefficient in the tube dimensionless ... See full document

... Heat transfer enhancement is an active and important field of engineering research since it increases the effec- tiveness of heat ...Suitable heat transfer aug- mentation techniques may ... See full document

... near wall region, the particle is transported mainly by the large turbulent coherent structures and strongly depends on the ejections and ...of flows of many practical ... See full document

... convective heat transfer coefficient and Nusselt number of nanofluids are higher than those of distilled ...convective heat transfer and pressure drop of nanofluids tested in fully developed ... See full document

... a numerical prediction has been conducted to study heat transfer and flow friction behaviors in turbulent channel flows over periodic trapezoidal grooves, ribbed and rib-grooved ... See full document

... to study buoyancy-driven turbulent mixing is the Rayleigh– Taylor instability ...growing turbulent mixing ...the turbulent mixing zone, where the slowly evolving fine-scale turbu- lence is ... See full document

... for turbulent core flows as it is coupled with wall functions (semi-empirical formulas usually approximating the log-law ...the wall-adjacent cells are in the log-law region (as in Mesh ... See full document

... respectively. From the graphs, the friction factor decreases when the Reynolds number increases. However, the nanofluid concentration did not give significant effect to friction factor as compared to mixture of water and ... See full document

... a numerical model has been developed to study about the steady, three dimensional vortex breakdown in a closed cylindrical container with a rotating end ...end wall is mainly due to the axial vortex ... See full document

... is study, was a lso in vestigated* To th is end some exploratory work was carried out u sin g a Laser Doppler anemometer in a pipe flow experiment* Dett'dls o f the technique and the r e s u lts obtained have been ... See full document

... studied numerical solution of the heat conduction equation with the electro thermal analogy and the code ...constant heat flux using ...the numerical Network Simulation ...and study the ... See full document

... Since the initial spanwise vorticity is conned to just the sheet region, the ow is lacking the considerable amount of spanwise vorticity which would be present in the central region of the channel in the fully developed ... See full document

... A decreased flow of cooling water (due to other reasons) also causes an Increase in the condensation temperature due to a larger in­ crease in the temperature of cooling water passing through the condenser and due to a ... See full document