Sökning: "numerical modeling"

Visar resultat 1 - 5 av 202 avhandlingar innehållade orden numerical modeling.

  1. 1. CFD in the design of gas quenching furnace

    Författare :Olivier Macchion; KTH.; [2005]
    Nyckelord :MATEMATIK; MATHEMATICS; Numerical analysis; Gas quenching; modeling; CFD; gas mixtures; uniformity.; Numerisk analys;

    Sammanfattning : This thesis focuses on the numerical and theoretical studies of gas quenching in industrial furnaces. Gas quenching is the rapid cooling of metal pieces, aiming at forcing a phase transformation of the metal structure to improve its mechanical properties. LÄS MER

  3. 2. PDEModelica – A High-Level Language for Modeling with Partial Differential Equations

    Detta är en avhandling från Institutionen för datavetenskap

    Författare :Levon Saldamli; Institutionen för datavetenskap.; Tekniska högskolan.; [2006]
    Nyckelord :TEKNIKVETENSKAP; TECHNOLOGY; mathematical modeling; PDEModelica; Modelica; object-oriented modeling; equation-based modeling; declarative modeling; high-level modeling languages; mathematical modeling languages;

    Sammanfattning : This thesis describes work on a new high-level mathematical modeling language and framework called PDEModelica for modeling with partial differential equations. It is an extension to the current Modelica modeling language for object-oriented, equation-based modeling based on differential and algebraic equations. LÄS MER

  4. 3. Numerical modeling of dielectrophoresis

    Detta är en avhandling från Stockholm : Mekanik

    Författare :Yuan Lin; KTH.; [2006]
    Nyckelord :TEKNIKVETENSKAP; TECHNOLOGY; dielectrophoresis; orientation of rotation; fluid particle dynamics; microparticle; molecular dynamics; hydrodynamics; particle-particle interaction; superimposed; mobility;

    Sammanfattning : We investigate the dielectrophoretic separation of microparticles. Two different models are formulated in two characteristic time scales. The first model mainly accounts for the orientation behavior and rotational motion of non-spheric microparticles. The concept of effective charge is suggested to calculate the finite size non-spheric particles. LÄS MER

  5. 4. Numerical Methods for Stochastic Modeling of Genes and Proteins

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Paul Sjöberg; Uppsala universitet.; Uppsala universitet.; [2007]
    Nyckelord :MATEMATIK; MATHEMATICS; NATURVETENSKAP; NATURAL SCIENCES; master equation; Fokker-Planck equation; stochastic models; biochemical reaction networks; Scientific Computing; Beräkningsvetenskap;

    Sammanfattning : Stochastic models of biochemical reaction networks are used for understanding the properties of molecular regulatory circuits in living cells. The state of the cell is defined by the number of copies of each molecular species in the model. LÄS MER

  7. 5. Numerical methods for waveguide modelling

    Detta är en avhandling från Stockholm : Numerisk analys och datalogi (NADA), (tills m KTH)

    Författare :Christer Johansson; Stockholms universitet.; [2006]
    Nyckelord :MATEMATIK; MATHEMATICS; Waveguide; finite element; hp-adaptivity; helmholtz; maxwell;

    Sammanfattning : Waveguides are used to transmit electromagnetic signals. Their geometry is typically long and slender. This particular shape can be used in the design of efficient computational methods. Only special modes are transmitted and eigenvalue and eigenvector analysis becomes important. LÄS MER