Thermo-flow Analysis of Cylinder with Crossed Splitter Plates with a Characteristics-based Scheme

Abstract

In the present work, the laminar flow through a circular cylinder with two crossed splitter plates is analyzed. The characteristic-based method has been used along with the unstructured grid. The current research has been done to detect the proper conditions according to the geometrical parameters in which the optimal heat transfer is taking place. Geometric control parameters are the angle of splitter plates (\theta) and the ratio of length of the splitter plate to cylinder radius (n=L/D). It was found that the use of a two-branched splitter plate is not wise in Reynolds number less than 100 due to its insignificant effect in flow properties. In angle 30° between two plates, the least drag force is witnessed with respect to other angles. Application of double branched splitter with angles more than 60° is not recommended, which will increase the total drag significantly. Since the splitter plate increases, the overall heat transfer from the cylinder and splitter set is enhanced. Minimum drag over the cylinder, and maximum convection drop from it is taken place when the dimension length is 0.75. Between dimensionless lengths 1.25 and 1.5, the Nusselt number oscillates with least amplitude and such behavior is also observed when two splitters are 60°apart.

Control over Vortex Shedding and Drag Force on a Circular Obstacle Using a Pair of Downstream Splitter Plates in a Transient Flow

“…Indeed, the bifurcated splitter plates can be used in several practical problems, such as behind heat exchanger tubes to enhance the heat transfer while keeping the drag to a minimum. Recently, the fow through a round cylinder with a pair of crossed-splitters is analyzed by Razavi et al [34]. Because a two-branched splitter plate has a negligible impact on fow characteristics, it was discovered that using one in Reynolds numbers under 100 is not advisable.…”