Search for dissertations about: "resolving"

Showing result 6 - 10 of 288 swedish dissertations containing the word resolving.

2. 6. Development of Numerical Methods for Accurate and Efficient Scale-Resolving Simulations

   Author : Magnus Carlsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-order gradient reconstruction; Hybrid RANS-LES; Scale-resolving simulation; Synthetic Turbulence; Numerical methods; Turbulence modelling;

   Abstract : Hybrid RANS (Reynolds-Averaged Navier-Stokes)-LES (Large-Eddy Simulation) techniques are considered to be sufficiently accurate and computationally affordable for the aeronautical industry. Scale-resolving simulations is a powerful tool that can accurately predict complex unsteady compressible high-Reynolds-number turbulent flows, as often encountered aeronautical applications. READ MORE

4. 7. Towards Improved Scale-Resolving Modeling and Simulations of Turbulent Flows

   Author : Magnus Carlsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hybrid RANS-LES; Numerical methods; Synthetic Turbulence; Compressible flow; Scale-resolving simu- lation; High-order gradient reconstruction; Turbulence modelling;

   Abstract : Scale-resolving simulations are viewed as powerful means for predicting complex turbulentflows, as often encountered in aeronautical applications. However, since turbulent scalesspan over a considerable range from the smallest Kolmogorov scales to the largest ofequivalence to configuration size, scale-resolving computations are often demandingon computational resources and, furthermore, on the underlying numerical methodsused in the simulations. READ MORE

5. 8. Immunopathogenic aspects of resolving and progressing appendicitis

   Author : Marie Rubér; Christina Ekerfelt; Roland Andersson; Gunnar Olaison; Johan Rönnelid; Linköpings universitet; []
   Keywords : ;

   Abstract : Background: Appendicitis is one of the most common diseases requiringemergency surgical intervention. There are several indications that the diagnosisappendicitis harbours two different entities, one progressing to gangrene and perforation(advanced) and one that resolves spontaneously (phlegmonous). READ MORE

6. 9. Resolving developing neuronal lineages in the ventral midbrain

   Author : Nigel Kee; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : The numerous cells and cell types of our bodies originate from a fertilised egg. Through the study of the developing embryo, we have come to understand much about how different cells in different tissues arise from this single cell, and how they are related to one another within an expansive family tree. READ MORE

7. 10. Methodologies for RANS-LES interfaces in turbulence-resolving simulations

   Author : Sebastian Arvidson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; zonal RANS-LES; aeronautics; RANS-LES interfaces; Hybrid RANS-LES; grey-area mitigation; log-layer mismatch; embedded LES; LES length scale; LES;

   Abstract : Hybrid Reynolds-Average Navier-Stokes (RANS)-Large-Eddy Simulations (LES) techniques are now seen by the aeronautical industry as the most promising turbulence-resolving approaches for complex high-Reynolds-number turbulent flows with regard to cost and accuracy. However, connecting RANS and LES simulated flows is a challenging task and needs special attention in order to increase simulation robustness and accuracy. READ MORE