Over the course of the past decade, a number of investigations have been conducted to better understand the fluid flow and heat transfer in channel heat sinks. In this study full three-dimensional (3-D) conjugate heat transfer analysis is performed by computational fluid dynamics (CFD) codes for evaluating the thermal performance of rectangular cooling channel (heat sinks)

Pallis, Jani M.

Singh, Ravinder

UB ScholarWorks

AbstractOver the course of the past decade, anumber of investigations have beenconducted to better understand the fluidflow and heat transfer in channel heatsinks.In this study full three-dimensional (3-D)conjugate heat transfer analysis isperformed by computational fluiddynamics (CFD) codes for evaluating thethermal performance of rectangularcooling channel (heat sinks).Simulation of 3-D Conjugate Heat Transfer in a rectangular cooling channel.   Ravinder Singh,  Jani PallisDepartment of Mechanical EngineeringUniversity of Bridgeport, Bridgeport, CT IntroductionThe present study conducts numericalstudy of heat transfer inside coolingchannel with single level flowarrangements.Mathematical Modeling The following assumptions are made for the simplified model analysis:●Force due to gravity is neglected. ●Heat dissipation caused by viscosity isneglected. ●Incompressible flow. ●Laminar flow (for simplified mathematicalmodeling). ●Negligible radiative heat transfer. ●Uniform convective heat transferfrom the top surface (neglected for the mathematical model). ●Hydrodynamicallyfully developed but thermally developing flow.For steady, fully-developed laminar flow in which,∂u/ ∂x = 0, v = 0 and w = 0.The momentum equation for the liquid flow can be expressed as:∂²u  +  ∂²x =  - 1   dP   =    - 1   ∆P ∂y²       ∂z²           µ   dx           µ   LxWhere the boundary conditions are:at the channel wall surface (no slip),                      u = 0at the inlet,                                                              x = 0, P = Pin  at the outlet,                                                            x = 0, P = PoutThe energy equation for the liquid is: # 84-G:  __  __  __Rectangular channel heat sinks feature ahigh convective heat transfer coefficient,which is beneficial for various applicationwhere a very high rate of heat transfer isrequired.In the current investigation, a detailednumerical simulation of the heat transferoccurring in Aluminum-based rectangularchannel heat sinks has been conducted inorder to optimize the geometric structureusing a simplified, three-dimensional(3–D) conjugate heat transfer model[two-dimensional (2-D) fluid flow and 3-D heat transfer]. The investigated channelmodeled with the length of 40mm andrectangular cross-section of 8mm X 6mmwith the 6mm X 4mm coolant flowregion.Domain of the numerical simulation. u· ∂T/ x    =    K  ( ∂²T/ ∂²x + ∂²T/ ∂²y + ∂²T/ ∂²z )Cp ρThe heat conduction equation in the cooling channel:∂/ ∂x ( K  ∂T/ ∂x ) + ∂/ ∂y ( K  ∂T/ ∂y ) + ∂/ ∂z ( K  ∂T/ ∂z ) = 0Simulation ResultsTemperatureProfileConjugate heat Transfer profile 3-DConclusionThe preceding analysis investigated the 3-D governing equations for fluid flow and heat transfer. The development work ongoing in the area of microchannels is broad, including different sizes and channel geometries, different liquids and gases, and microchannels with phase change. This analysis helped us in optimizing the channel geometry.

Simulation of 3-D Conjugate Heat Transfer in a rectangular cooling channel

https://scholarworks.bridgeport.edu/xmlui/bitstream/handle/123456789/612/84-G.Singh.pdf?sequence=2&isAllowed=y

Simulation of 3-D Conjugate Heat Transfer in a rectangular cooling channel

Abstract

Similar works

Full text

Available Versions

UB ScholarWorks