Sökning: "direct numerical simulation"
Visar resultat 16 - 20 av 123 avhandlingar innehållade orden direct numerical simulation.
16. Direct Numerical Simulation of Boundary-layer Transition with Free-stream Turbulence
Sammanfattning : This thesis considers the generation and influence of free-stream turbulence toboundary layer transition on both flat and curved bodies in the flow. Variousflow configurations such as flow around the flat plate with a sharp leading edgeand low-pressure turbine blades are considered. LÄS MER
17. Transonic flow: large eddy simulation, numerical methods and subgrid modeling
Sammanfattning : Shock wave turbulent boundary layer interactions (SWTBLI) commonly arise in turbomachinery and aerospace applications and on the exterior of high speed aircrafts. In all these cases, SWTBLI can significantly change the flow and hence the physical load imposed by it. LÄS MER
18. Variance Reduction in Analytical Chemistry : New Numerical Methods in Chemometrics and Molecular Simulation
Sammanfattning : This thesis is based on five papers addressing variance reduction in different ways. The papers have in common that they all present new numerical methods. LÄS MER
19. Numerical and Symbolic Methods for Dynamic Optimization
Sammanfattning : Mathematical optimization is becoming increasingly important for engineering in general and control in particular. This thesis deals with numerical methods, primarily direct collocation, and symbolic methods, primarily block-triangular ordering and tearing, for numerical solution of general dynamic optimization problems involving dynamical systems modeled by large-scale differential-algebraic equations (DAE). LÄS MER
20. Modelling and simulation of turbulence subject to system rotation
Sammanfattning : Simulation and modelling of turbulent flows under influence of streamline curvature and system rotation have been considered. Direct numerical simulations have been performed for fully developed rotating turbulent channel flow using a pseudo-spectral code. The rotation numbers considered are larger than unity. LÄS MER