Search for dissertations about: "Phase stability"

Showing result 16 - 20 of 688 swedish dissertations containing the words Phase stability.

  2. 16. Adaptive Finite Element Methods for Compressible Two-Phase Flow

    Author : Erik Burman; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; adaptive finite element methods; two-phase flow; compressible flow; conservation laws; hyperbolic systems; a posteriori error estimates; streamline diffusion; stability analysis; quantitative error control; adaptive algorithms; quantitative error control;

    Abstract : In this thesis we develop, apply and analyse adaptive finite element methods with error control for compressible flow problems, focusing in particular on two-phase flow. The adaptive algorithms, aiming at quantitative error control with efficient use of computational resources, are based on a posteriori error estimates, where the error is estimated in terms of the computed solution, the local mesh-size and certain stability factors. READ MORE

  4. 17. Phase Transformations in Solid Pharmaceutical Materials Studied by AFM, ESCA, DSC and SAXS

    Author : Denny Mahlin; Göran Alderborn; Sven Engström; Duncan Q M Craig; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; polymer; lipid; lactose; phase transformation; phase formation; crystallisation; AFM; X-ray diffraction; ESCA; DSC; solid dispersion; Fysikalisk kemi; Physical chemistry; Fysikalisk kemi;

    Abstract : Mixing excipients is a common way to produce pharmaceutical materials with suitable properties for drug formulation. An understanding of the basic mechanisms involved in the formation and transformation of the structures of solid state mixtures is crucial if one is to be able to produce materials with the desired properties in a reliable way. READ MORE

  5. 18. X-ray Phase Contrast Tomography : Setup and Scintillator Development

    Author : Hanna Dierks; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; x-rays; x-ray imaging; x-ray microscopy; X-ray detectors; perovskites; laboratory setups; phase contrast; μCT; scintillator; Phase contrast PC ; Tomography x-ray computed ;

    Abstract : X-ray microscopy and micro-tomography (μCT) are valuable non-destructive examination methods in many disciplines such as bio-medical research, archaeometry, material science and paleontology. Besides being implemented at synchrotrons radiation sources, laboratory setups using an X-ray tube and high-resolution scintillation detector routinely provide information on the micrometre scale. READ MORE

  6. 19. Structure and energetics of kappa alumina (-Al2O3) calculated from first principles

    Author : Yashar Yourdshahyan; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electronic properties; structure; plane-waves; local-density-approximation; stability; ceramics materials; Al2O3 K-phase; pseudopotentials; density-functional theory;

    Abstract : .... READ MORE

  7. 20. Storage Stability and Phase Separation Behaviour of Polymer-Modified Bitumen : Characterization and Modelling

    Author : Jiqing Zhu; Niki Kringos; Dallas Little; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymer-modified bitumen; Storage stability; Phase separation; Fluorescence microscopy; Phase-field modelling; Polymermodifierad bitumen; Lagringsstabilitet; Fasseparation; Fluorescensmikroskopi; Fas-fälts modellering; Transportvetenskap; Transport Science;

    Abstract : Polymer-modified bitumen (PMB) is a high-performance material for road construction and maintenance. But its storage stability and phase separation behaviour are still not sufficiently understood and need to be studied toward a more successful and sustainable application of PMB. READ MORE