Search for dissertations about: "Moving Boundaries"

Showing result 16 - 20 of 39 swedish dissertations containing the words Moving Boundaries.

  2. 16. Finite Difference Methods for Time-Dependent Wave Propagation Problems

    Author : Ylva Ljungberg Rydin; Ken Mattsson; Erik Sjöqvist; Magnus Svärd; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Finite differences; Wave propagation problems; Summation-by-parts; Simultaneous approximation term; High-order accuracy; Deforming domains; Point sources; Scientific Computing; Beräkningsvetenskap;

    Abstract : Wave propagation models are essential in many fields of physics, such as acoustics, electromagnetics, and quantum mechanics. Mathematically, waves can be described by partial differential equations (PDEs).  In most cases, exact solutions to wave-dominated PDEs are nearly impossible to derive. READ MORE

  4. 17. Stable High Order Finite Difference Methods for Wave Propagation and Flow Problems on Deforming Domains

    Author : Samira Nikkar; Jan Nordström; Gunilla Kreiss; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : We construct stable, accurate and efficient numerical schemes for wave propagation and flow problems posed on spatial geometries that are moving, deforming, erroneously described or non-simply connected. The schemes are on Summation-by-Parts (SBP) form, combined with the Simultaneous Approximation Term (SAT) technique for imposing initial and boundary conditions. READ MORE

  5. 18. Prediction of random vibration using spectral methods

    Author : Fredrik Birgersson; KTH; []
    Keywords : Spectral finite element method; distributed excitation; turbulent boundary layer measurements; random vibration; spectral super element method; wave expansion difference scheme; fluid-structure interaction;

    Abstract : Much of the vibration in fast moving vehicles is caused bydistributed random excitation, such as turbulent flow and roadroughness. Piping systems transporting fast flowing fluid isanother example, where distributed random excitation will causeunwanted vibration. READ MORE

  6. 19. GO LO GO HI : Tracing the Development of Masculine Domesticities from the Garage to the Penthouse — A Multi-Modal Exploration in Architecture, Urban Environments, Film, and the Arts

    Author : Janek Oźmin; Catharina Gabrielsson; Victor Edman; Valéry Didelon; KTH; []
    Keywords : HUMANIORA; HUMANITIES; Multi-Modal; Sites of Enquiry; Masculine Domesticities; Suburban Garage; Penthouse; Architecture; The City; Film; Advertising Media; Technology; Consumption; Leisure; Real Estate; Spatial Container; Practice-Based Research; Urban Design; Stadsbyggnad;

    Abstract : GO LO GO HI is a multi-modal enquiry into the relationship between masculine domesticities and the architectures of the suburban garage and penthouse apartment. The project adopts the garage and the penthouse as sites of enquiry, which means thinking through architecture as a cultural phenomenon, the agency of which includes but is not limited to spatial design, material compositions, visual representations, and historical contexts. READ MORE

  7. 20. Vacuum infusion of polymer composites

    Author : Magnus Andersson; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : The current trend towards an increased use of vacuum infusion for manufacturing of high performance fibre reinforced polymer composites has stressed the necessity of an advanced modelling of the process. Until recent years development in this area has mainly been based on trial and error and the behaviour of the method is therefore not fully understood. READ MORE