Sökning: "Fibre model"
Visar resultat 1 - 5 av 276 avhandlingar innehållade orden Fibre model.
1. Simulations of the Dynamics of Fibre Suspension Flows
Sammanfattning : A new model for simulating non-Brownian flexible fibres suspended in a Newtonian fluid has been developed. Special attention has been given to include realistic flow conditions found in the industrial papermaking process in the key features of the model; it is the intention of the author to employ the model in simulations of the forming section of the paper machine in future studies. LÄS MER
2. Fibre flow mechanisms
Sammanfattning : The flow behaviour, and primarily the floc-floc interaction, of pulp paper suspensions have been studied visually. Analogy models based on these observations have been developed as well as the identification of important parameters of floc break-up in low shear rate flow fields. LÄS MER
3. Two-phase flows in gas-evolving electrochemical applications
Sammanfattning : .... LÄS MER
4. Micro-mechanical mechanisms for deformation in polymer-material structures
Sammanfattning : In this thesis, the focus has been on micro-mechanical mechanisms in polymer-based materials and structures. The first part of the thesis treats length-scale effects on polymer materials. Experiments have showed that the smaller the specimen, the stronger is the material. LÄS MER
5. A Network Model Applied to Cellulose Fibre Materials
Sammanfattning : A network mechanics model for analysis of materials made of dry-shaped cellulose fibres is proposed. In terms of the model, the network is composed of fibres of arbitrary distribution in length, curvature, cross-section. stiffness and strength. The fibres are arranged in a random structure according to an arbitrary orientation distribution. LÄS MER