Sökning: "mesh sensitivity"
Visar resultat 11 - 15 av 34 avhandlingar innehållade orden mesh sensitivity.
11. Numerical Modelling of Diesel Spray Injection and Turbulence Interaction
Sammanfattning : It has been established by many authors that numerical simulations ofDiesel sprays, using a Lagrangian description for the liquid phase,are particularly sensitive to the scale of the computational cellscompromising the mesh. There have been many suggestions regardingmeans to reduce the dependency on the mesh by improving the componentsubmodels, but few have addressed the gas phase turbulence modelling. LÄS MER
12. Non-local models in manufacturing simulations
Sammanfattning : Ductile fracture presents challenges with respect to material modelling andnumerical simulations of localization. The strain and damage localization maybe unwanted as it indicates a failure in the process or, as in the case ofmachining and cutting, a wanted phenomenon to be controlled. LÄS MER
13. Microstructure based modelling of ductile fracture in quench-hardenable boron steel
Sammanfattning : Reduction of fuel consumption and emissions by vehicle weight minimization constitute a major driving force for the development of new materials and manufacturing processes in the automotive industry. Simultaneously formed and quenched boron steel components have higher strength to weight ratio than conventional mild steel components. LÄS MER
14. Turbulence Modelling for Internal Cooling of Gas-Turbine Blades
Sammanfattning : Numerical simulations of geometrical configurations similar to those present in the internal cooling ducts within gas turbine blades have been performed. The flow within these channels are characterized by heat transfer enhancement ribs, sharp bends, rotation and buoyancy effects. LÄS MER
15. Elastic-Plastic Fracture Mechanics and RCF in Rails
Sammanfattning : This thesis concerns issues regarding the modeling and numerical simulation of singularcracks and their propagation in the context of Rolling Contact Fatigue (RCF) in rails.Typically, such cracks are associated with squats and head-checks in the rail head. LÄS MER