Search for dissertations about: "gravity equation"

Showing result 26 - 30 of 34 swedish dissertations containing the words gravity equation.

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

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

    Abstract : 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. READ MORE

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

    Author : Eric Peirano; Chalmers tekniska högskola; []
    Keywords : 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;

    Abstract : 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. READ MORE

  5. 28. 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

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

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

    Abstract : 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). READ MORE

  7. 30. Some results on closed-loop identification of quadcopters

    Author : Du Ho; Martin Enqvist; Gustaf Hendeby; Alexander Medvedev; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : In recent years, the quadcopter has become a popular platform both in research activities and in industrial development. Its success is due to its increased performance and capabilities, where modeling and control synthesis play essential roles. READ MORE