STUDI NUMERIK 2-D PENGARUH PRANDTL NUMBER DAN SUB-CRITICAL REYNOLDS NUMBER TERHADAP KARAKTERISTIK ALIRAN DAN PERPINDAHAN PANAS PADA SINGLE CIRCULAR CYLINDER
Abstract: The phenomenon of
the process of flow and heat transfer in single circular cylinder is the base
concept to determine the characteristics of flow and heat transfer in a
circular cylinder arranged in a particular pattern , the practical application
is widely used in industries such as determining the design arrangement of tube
or pipe in the tool of heat tranfer (heat exchangers). The amount of heat
transfer when the fluid flow across (cross flow) circular cylinder indicated by
the parameter Nusselt number, be it is local Nusselt number (NuŠ¤) and Average
Nusselt number ( is strongly influenced by the Prandtl number and Reynolds
number, where the area in the boundary layer that contribution is very large in
the process of heat transfer is a stagnation point at the laminar boundary
layer region, reattachment of the shear layer region on the transition boundary
layer and periodic vortex flow region (turbulent boundary layer) in the region
wake. Fluid flow phenomena and periodic vortex flow region accompanied by the
occurrence of vortex shedding and Karman vortex street. The method used in this
research is the study of numerical 2-D unsteady RANS (Reynolds-averaged Navier
Stokes), using simulation analysis SST k-Ļ turbulence models in software CFD
FLUENT to obtain data relating to the characteristics of fluid flow and heat
transfer. Validation of numerical use grid independence according to Nusselt
number of experimental results and the results of calculations using the
empirical correlation equation. Numerical studies showed significant results
that the Nusselt number is influenced by the value of Reynolds number and
Prandtl number and can be used as a basis concept for studying the mechanism of
the phenomenon of the concept of flow and heat transfer tube banks of heat
exchangers. Value of local Nusselt number (NuŠ¤) numerical simulation results
increased with increasing Reynolds number and Prandtl number, where NuŠ¤ = 21.55
up to NuŠ¤ = 128.2, and from NuŠ¤ = 21.55 up to NuŠ¤ = 598.76.
Keywords: Nusselt number
Prandtl number, Reynolds number, 2-D unsteady RANS, SST k-Ļ turbulence model
Penulis: Arif Kurniawan
Kode Jurnal: jptmesindd160347