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Visar resultat 1 - 5 av 192 avhandlingar som matchar ovanstående sökkriterier.
1. Saving Energy in Construction Machinery using Displacement Control Hydraulics : Concept Realization and Validation
Sammanfattning : In the sector of mobile hydraulics, valve controlled systems are predominant. In these systems the load force and speed are adjusted by control valves. In machines where multiple drives are used in parallel at extremely varying loads the energy efficiency of such systems is often compromised over large working regions. LÄS MER
2. Transitional and turbulent fibre suspension flows
Sammanfattning : In this thesis the orientation of macro-sized fibres in turbulent flows is studied, as well as the effect of nano-sized fibrils on hydrodynamic stability. The focus lies on enabling processes for new materials where cellulose is the main constituent. LÄS MER
3. Turbulence modulation effects caused by small droplets using one-dimensional-turbulence
Sammanfattning : This thesis presents a stochastic model to study turbulence modulation effects on gas phases caused by small droplets or more generally speaking particles to achieve a better understanding about the physics and with the aim to provide data for a subgrid-scale (SGS) model for Large-eddy-simulations. The one-dimensional-turbulence (ODT) model addresses one of the major issues for multiphase flow simulations, namely computational costs. LÄS MER
4. Analysis of Power Performance and Mooring Fatigue Damage for Wave Energy Parks
Sammanfattning : Wave energy has been recognized as a promising alternative to traditional energy sources due to its cleanliness and sustainability. To harness this energy, wave energy converters (WECs) are utilized. LÄS MER
5. Implementation of a flexible fiber model in a general purpose CFD code
Sammanfattning : This work is related to the process of making pulp mats for use in hygienicproducts. One part of that process is the transportation of flexiblecellulose fibers suspended in flowing air. The fibers should be evenlydistributed on the substrate, and it is thus of high importance to avoidthe formation of fiber flocks during the transportation. LÄS MER