Engineering

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Introduction:

Simulation Of Turbulent Flows Through a Solar Air HeaterConventional solar air heaters have poor thermal efficiency due to low-convective heat transfer coefficient between absorber plate and flowing air stream. It can be increased by increasing the level of turbulence by breaking laminar viscous sublayer. For this purpose artificial roughness are applied on the surface of absorber plate to enhance heat transfer by passive technique.

The enhancement in heat transfer accompanies higher pressure drop of the fluid flow. In order to keep friction losses at a low level, the turbulence must be created in the region close to the duct surface, that is, in the laminar sublayer.

 

Objective:

The objective of this study is to observe the heat transfer enhancement using Square-Sectioned artificial roughness on the absorber plate of the Solar Air Heater (SAH) and to evaluate the effect on Average Nusselt Number and Average Friction Factor.

 

 

Use Of Artificial Roughness

 Modeing Of 2 D Solar Air Heater

Geometry Of 2 D Solar Air Heater

Meshing

 

 

Boundary Conditions Of Solar Air Heater

 Velocity T.I Calculation Corresponding to Reynolds Number

 Turbulence Model For Solar Air Heater 2D

Reuslts Of 2D Solar Air Heater

Nusselt Number Variation Of 2D Solar Air Heater

Friction Fator Of 2D Solar Air Heater

TKE Contour Result 2D Solar Air Heater

Velocity Contour Result 2D Solar Air Heater

Pressure Contour Result 2D Solar Air Heater

Temperature Contour Result 2D Solar Air Heater

Conclusion