Sökning: "Gravity Equation"

Visar resultat 26 - 30 av 34 avhandlingar innehållade orden Gravity Equation.

  1. 26. Development of a Free Surface Capability in a RANS Solver with Coupled Equations and Overset Grids

    Författare :Michal Orych; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; free-surface; overset; RANS;

    Sammanfattning : This thesis is a result of investigations carried out during the implementation of a free surface capturing method in a RANS solver. The work consists of two distinct parts which complement each other, and the purpose is to improve the free surface interface sharpness and to reduce numerical diffusion of the gravity waves. LÄS MER

  3. 27. Modelling and Simulation of Turbulent Gas-Solid Flows applied to Fluidization

    Författare :Eric Peirano; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Eulerian models; fluidization; two-fluid model; two-phase flow; granular flow theory; turbulence; fluidized beds; gas-solid flows;

    Sammanfattning : Modelling of gas-solid suspensions has been studied with emphasis on suitable closure laws. A study of characteristic time scales and energy dissipation mechanisms is made for the case of a simple shear flow. Applications of the modelling are presented in the form of simulation and validation of experiments in fluidized beds. LÄS MER

  4. 28. Storage Stability and Phase Separation Behaviour of Polymer-Modified Bitumen : Characterization and Modelling

    Författare :Jiqing Zhu; Niki Kringos; Dallas Little; KTH; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  5. 29. Essays on International Trade, Productivity and Firm Heterogeneity

    Författare :Anders Åkerman; Rikard Forslid; Diego Puga; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Agglomeration; productivity; firm heterogeneity; export processing zones; firm dynamics; market size; beachhead costs; natural experiment; Economics; Nationalekonomi; Economics; nationalekonomi;

    Sammanfattning : The thesis consists of three papers, summarized as follows.”Trade, Intra-Industry Reallocations and Aggregate Productivity: A Bridge between Theory and Data in Öresund”The paper aims at estimating the causal effect of trade liberalisation on aggregate productivity through firm selection as in Melitz (2003). LÄS MER

  7. 30. Compact Relativistic Matter Shells with Massless and Charged Particles

    Författare :Maximilian Thaller; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Spherical Symmetry; massless Einstein-Vlasov system; Einstein-Vlasov-Maxwell system; Static Solutions; Vlasov matter; General Relativity; Einstein-Vlasov-Maxwell system;

    Sammanfattning : The Vlasov model is a matter model that is widely used in physics. In the context of astrophysics and cosmology it describes an ensemble of self gravitating, collisionless particles. These particles can be interpreted as for example ions, stars, or galaxies. LÄS MER