Search for dissertations about: "inviscid compressible flow"

Showing result 1 - 5 of 6 swedish dissertations containing the words inviscid compressible flow.

  1. 1. Shape optimization in compressible inviscid flow

    University dissertation from Linköping : Linköpings universitet

    Author : Oskar Enoksson; Linköpings universitet.; Linköpings universitet.; [2000]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This thesis describes methods for aerodynamic optimization, including a new derivation of an adjoint method for efficient computation and regularization of the gradient. Also, a general method using different surface parameterizations is presented. READ MORE

  2. 2. Acceleration of Compressible Flow Simulations with Edge Using  Implicit Time Stepping

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Evelyn Otero; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Compressible CFD; Convergence Acceleration; Implicit Time-Stepping; LU-SGS; Upwind Type Dissipation; Line-implicit; Ordering; Parallelization; Parameters; Multigrid;

    Abstract : Computational fluid dynamics (CFD) is a significant tool routinely used indesign and optimization in aerospace industry. Often cases with unsteadyflows must be computed, and the long compute times of standard methods hasmotivated the present work on new implicit methods to replace the standardexplicit schemes. READ MORE

  3. 3. Numerical Methods for Aerodynamic Shape Optimization

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Olivier Amoignon; Uppsala universitet.; Uppsala universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Computational Fluid Dynamics; shape optimization; adjoint equations; edge-based finite-volume method; moving mesh adaptation; radial basis functions; inviscid compressible flow; transition control; Numerical Analysis; Numerisk analys;

    Abstract : Gradient-based aerodynamic shape optimization, based on Computational Fluid Dynamics analysis of the flow, is a method that can automatically improve designs of aircraft components. The prospect is to reduce a cost function that reflects aerodynamic performances. READ MORE

  4. 4. Data Assimilation in Fluid Dynamics using Adjoint Optimization

    University dissertation from Matematiska institutionen

    Author : Johan Lundvall; Linköpings universitet.; Linköpings universitet.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Data assimilation; Inverse problem; Adjoint optimization; Burgers equation; nonlinear; Landweber; Initial pressure; Euler flow; MATHEMATICS Applied mathematics; MATEMATIK Tillämpad matematik;

    Abstract : Data assimilation arises in a vast array of different topics: traditionally in meteorological and oceanographic modelling, wind tunnel or water tunnel experiments and recently from biomedical engineering. Data assimilation is a process for combine measured or observed data with a mathematical model, to obtain estimates of the expected data. READ MORE

  5. 5. Computational Aeroacoustics Based on Large Eddy Simulation and Acoustic Analogies

    University dissertation from KFS AB

    Author : Mihai Mihaescu; Lunds universitet.; Lund University.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computational Aeroacoustics; Turbulent Flows; Large Eddy Simulation; Acooustic Analogies; Acoustic Source Terms; Inhomogeneous Wave Equation; Acoustic Boundary Conditions; Mechanical engineering; hydraulics; plasma; Technological sciences; Teknik; fluiddynamik; plasmas; Gaser; fluid dynamics; Gases; LES; vacuum technology; vibration and acoustic engineering; hydraulik; vakuumteknik; vibrationer; akustik;

    Abstract : The thesis presents a numerical method developed by the author and its applications for computing the generated sound by an unsteady flow field and its propagation. The full equations of motion for compressible and unsteady flows describe both flow field and sound generation and propagation. READ MORE