Sökning: "Dual-time-stepping"
Hittade 4 avhandlingar innehållade ordet Dual-time-stepping.
1. Aerodynamics of an Aeroengine Intermediate Compressor Duct: Effects from an Integrated Bleed System
Sammanfattning : With the successful development of high-bypass-ratio turbofan engines, major aerodynamic components have been optimized and continuous efficiency improvements are getting harder to maintain. Therefore, to meet the requirements of lower emission of greenhouse gases, auxiliary modules such as intermediate ducts are receiving increasing interest. LÄS MER
2. Acceleration of Compressible Flow Simulations with Edge using Implicit Time Stepping
Sammanfattning : Computational fluid dynamics (CFD) has become a significant tool routinely used in design and optimization in aerospace industry. Typical flows may be characterized by high-speed and compressible flow features and, in many cases, by massive flow separation and unsteadiness. LÄS MER
3. Aspects of the recursive projection method applied to flow calculations
Sammanfattning : In this thesis, we have investigated the Recursive Projection Method, RPM, as an accelerator for computations of both steady and unsteady flows, and as a stabilizer in a bifurcation analysis.The criterion of basis extraction is discussed. LÄS MER
4. Eigenvalue analysis and convergence acceleration techniques for summation-by-parts approximations
Sammanfattning : Many physical phenomena can be described mathematically by means of partial differential equations. These mathematical formulations are said to be well-posed if a unique solution, bounded by the given data, exists. LÄS MER