A computational fluid dynamics (CFD) model investigating the heat transfer convective coefficient of the upstream face, the upstream face and the tube face, and the upstream face, tube face, and leeward face of a perforated sheet was developed. This model was based on the hexagonally shaped flow pattern that exists around each of the holes in a perforated sheet of a certain pitch to diameter ratio. The CFD model used in the investigation of the convective heat transfer coefficient involved a single hole in a thin hexagonally shaped sheet with appropriate boundary conditions. Through a series of models varying the inlet velocity, hole diameter, and the plate temperature and then solving for the exit temperature the convective coefficient could be obtained. After obtaining the convective coefficient, the Nusselt number was calculated. These values were then plotted against the Reynolds number and an equation for the line was obtained of the form: Nu=C1·ReC2(1)
The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, Heat transfer and fluid flow through porous media was investigated using numerical simulations and experiment. For the numerical simulations, two models were created. The first consisted of a two-dimensional numerical model created in MathCAD and was solved using the finite difference approach. The MathCAD model's flow in the porous media was described by the BrinkmanForchheimer-extended Darcy equation. The second model consisted of a computational fluid dynamics (CFD) porous media model using Fluent and was solved using the finite volume approach. Both models assumed constant fluid phase and properties. Pore diameters were held constant for each simulation; two different porosities were investigated. Boundary conditions were applied at the wall in which the temperatures of the fluid and the porous media were determined by coupled energy equations. The effects of the boundary condition, the Reynolds number, porosity, and heat input were examined. AbstractHeat transfer and fluid flow through porous media was investigated using numerical simulations and experiment. For the numerical simulations, two models were created. The first consisted of a two-dimensional numerical model created in MathCAD and was solved using the finite difference approach. The MathCAD model's flow in the porous media was described by the BrinkmanForchheimer-extended Darcy equation. The second model consisted of a computational fluid dynamics (CFD) porous media model using Fluent™ and was solved using the finite volume approach. Both models assumed constant fluid phase and properties. Pore diameters were held constant for each simulation; two different porosities were investigated. Boundary conditions were applied at the wall in which the temperatures of the fluid and the porous media were determined by coupled energy equations. The effects of the boundary condition, the Reynolds number, porosity, and heat input were examined.The experimental investigation consisted of a flow channel with a porous media section that was heated from below by a heat source. The variation of temperature of the fluid in the porous media was measured along the centerline and along the top wall and bottom wall. The heat source temperature and the fluid's inlet and outlet temperatures were also measured. The results of the numerical and CFD models as compared to the experimental data for fluid flow through porous media are presented in the paper.
The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, Heat transfer and fluid flow through porous media was investigated using numerical simulations and experiment. For the numerical simulations, two models were created. The first consisted of a two-dimensional numerical model created in MathCAD and was solved using the finite difference approach. The MathCAD model's flow in the porous media was described by the BrinkmanForchheimer-extended Darcy equation. The second model consisted of a computational fluid dynamics (CFD) porous media model using Fluent and was solved using the finite volume approach. Both models assumed constant fluid phase and properties. Pore diameters were held constant for each simulation; two different porosities were investigated. Boundary conditions were applied at the wall in which the temperatures of the fluid and the porous media were determined by coupled energy equations. The effects of the boundary condition, the Reynolds number, porosity, and heat input were examined. AbstractHeat transfer and fluid flow through porous media was investigated using numerical simulations and experiment. For the numerical simulations, two models were created. The first consisted of a two-dimensional numerical model created in MathCAD and was solved using the finite difference approach. The MathCAD model's flow in the porous media was described by the BrinkmanForchheimer-extended Darcy equation. The second model consisted of a computational fluid dynamics (CFD) porous media model using Fluent™ and was solved using the finite volume approach. Both models assumed constant fluid phase and properties. Pore diameters were held constant for each simulation; two different porosities were investigated. Boundary conditions were applied at the wall in which the temperatures of the fluid and the porous media were determined by coupled energy equations. The effects of the boundary condition, the Reynolds number, porosity, and heat input were examined.The experimental investigation consisted of a flow channel with a porous media section that was heated from below by a heat source. The variation of temperature of the fluid in the porous media was measured along the centerline and along the top wall and bottom wall. The heat source temperature and the fluid's inlet and outlet temperatures were also measured. The results of the numerical and CFD models as compared to the experimental data for fluid flow through porous media are presented in the paper.
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