Search for dissertations about: "heat sink design"

Showing result 1 - 5 of 23 swedish dissertations containing the words heat sink design.

2. 1. cfd modelling and experimental study on the fluid flow and heat transfer in copper heat sink design

   Author : Bijan Karimpourian; Jafar Mahmoudi; Mahram Mosfegh; Mälardalens högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; copper heat sink cfd fluent modelling simulation; Chemical energy engineering; Kemisk energiteknik; Energi- och miljöteknik;

   Abstract : AbstractThis thesis is studying the heatsinks new designs for copper heatsinks which utilizes modelling and simulation by CFD, construction of prototypes and experimental works. Challenges and complications in manufacturing of copper heatsinks are expressed and finding the solutions to these hindrances involve in this work. READ MORE

4. 2. On optimization of natural convection flows

   Author : Clio Saglietti; Dan S. Henningson; Kurt Maute; KTH; []
   Keywords : Natural convection cooling; topology optimization; flow optimization; heat sink; conjugate heat transfer; differentially heated cavity; optimal initial disturbances; adjoint optimization;

   Abstract : Two different techniques are presented for enhancing the thermal  performance of natural convection cooled heat sinks. The physics is  described by solving the conjugate heat transfer problem with a  spectral element method. The temperature distribution is computed in  two sub-domains, whose solution is then conjugated. READ MORE

5. 3. Experimental Investigations of Combustion Chamber Heat Transfer in a Light-Duty Diesel Engine

   Author : Jessica Dahlström; Förbränningsmotorer; []
   Keywords : internal combustion engines; heat transfer; diesel engine; Diesel combustion; combustion chamber geometry; piston geometry; spray parameters;

   Abstract : This work concerned experimental studies of heat transfer in a light-duty diesel engine. Combustion is affected by several parameters, such as pressure, engine speed, mass of injected fuel and in-cylinder gas flow. These parameters are in turn affected by the combustion chamber geometry and fuel spray characteristics. READ MORE

6. 4. Methods for Reducing the Complexity of Geometrical Structures Based on CFD Programming : Time Efficient Simulations Based on Volume Forces Coupled with Single and Two-phase Flow

   Author : Kamal Rezk; Lars Nilsson; Jonas Berghel; Erik Dahlquist; Karlstads universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Numerical design cycle; CFD; porous media; volume forces; heat exchanger; vacuum dewatering; time efficient simulations; Miljö- och energisystem; Environmental and Energy Systems;

   Abstract : Throughout recent years, computer based programs have been applied to solve and analyse industrial problems encountered global fields such as automobile design for reduction of CO2-gas, designing wind parks aimed at increasing power output etc. One of these developed programs is Computational Fluid Dynamics (CFD) which numerically solves complex flow behaviour based on computer power. READ MORE

7. 5. Slotless High-Performance Electric Drives : Harmonic Loss Analysis, Sensorless Control, and Inverter Design

   Author : Jonas Millinger; Oskar Wallmark; Juliette Soulard; Zi-Qiang Zhu; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Finite-element analysis; harmonic losses; sensorless control; slotless motor drives; thermal modeling; wide-bandgap inverter; Electrical Engineering; Elektro- och systemteknik;

   Abstract : Electric motor drives are a cornerstone for many fundamental functions in today’s society, and their expected dominance within the transport sector is considered one of the main keys to abate global warming. Subsequently, the incentives for improved performance of electric motor drives cannot be sufficiently emphasized. READ MORE