# Search for dissertations about: "homogeneous length-scale"

Showing result 1 - 5 of 11 swedish dissertations containing the words homogeneous length-scale.

1. ## 1. Measuring Material Properties through Gradient Based NMR: Diffusion and Imaging

Abstract : In this work new methods based Nuclear Magnetic Resonance (NMR) have been developed to measure different kinds of structural properties in soft materials. The advantage of using NMR as a technique to measure material properties is that it is non-destructive, which makes it possible to measure on the actual piece of material that will be used for the application. READ MORE

2. ## 2. Assessment and Some Improvements of Hybrid RANS-LES Methods

Abstract : Motivated by numerical analysis of a shock/boundary-layer interacting (SBLI) flow in a duct, where some typical existing hybrid RANS-LES methods become awkward to give accurate predictions of the shock-induced corner separation bubble, a new hybrid RANS-LES method, has been proposed. The model is based on a low-Reynolds-number (LRN) $k-\omega$ RANS model, which is one of the few models that are capable of giving reasonable predictions for the SBLI flow in RANS computations. READ MORE

3. ## 3. Methodologies for RANS-LES interfaces in turbulence-resolving simulations

University dissertation from Gothenburg : Chalmers tekniska högskola

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

4. ## 4. Modeling of magnetohydrodynamic turbulence

University dissertation from Stockholm : Mekanik

Abstract : Conventional one-point turbulence closures have beenextended with an additional transported scalar for modeling ofmagnetohydrodynamic (MHD) turbulence. The new scalar, α ,captures the length scale anisotropy and tendency towardstwo-dimensionality, which is characteristic feature of MHDturbulence, and allows accurate modeling of the Jouledissipation of turbulence. READ MORE

5. ## 5. Microscopic Dynamics and Structure of some Polymer-based Electrolytes

University dissertation from Stockholm : Mekanik

Abstract : The electrolyte is a key component in high-capacity lithium batteries and there is a large demand for improved materials to increase the performance. Polymer-based electrolytes offer advantages in the design of safer and lighter batteries. READ MORE