Mixed convection udow of heat source modules mounted on a horizontal plate has beenudstudied numerically. Present analysis is valid when the buoyancy force effects are smalludcompared to forced convection effects. The mixed convection udow problem is formulatedudby two- dimensional incompressible udow with the buoyancy term represented by Boussi-udnesq approximation. The governing equations are transformed in to an orthogonal trans-udformed plane and solved in stream function and vorticity formulation using high accuracyudfinite difference schemes. Results are reported for single and double heat sources mountedudon horizontal plate with and without thickness of the heat source module. Detailed re-udsults are reported on the thermal field of heat source modules or electronic componentsudmounted on a horizontal plate and its dependence on physical parameters such as the ex-udternal velocity, energy input, thickness and location of heat source modules etc. Resultsudshow that the surface temperature is decreases with the increase of free stream velocity.udThe surface temperature is decreases with the increase of energy input to the heat sourceuddue to buoyancy. The location of the heat source shows significant effect on the surfaceudtemperature and thermal field near the heat source. The surface temperature increasesudwith the increase of heat source location from the leading edge of the plate due to increaseudof thermal boundary layer thickness. The distance between the two heat sources shows audsignificant effect on thermal field near the heat source modules. The surface temperatureudis decreases with the increase of thickness of the heat source module due to increase ofudsurface area. The maximum surface temperature and average Nusselt number values areudreported for various combinations of Reynolds and Richardson numbers. The reportedudaverage Nusselt numbers are matching very well with the experimental results availableudfrom the literature.
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