Sökning: "Christer Johansson kth"

Hittade 4 avhandlingar innehållade orden Christer Johansson kth.

  1. 1. Numerical Methods for Ports in Closed Waveguides

    Författare :Christer Johansson; KTH; []
    Nyckelord :waveguides fem ports edge elements;

    Sammanfattning : Waveguides are used to transmit electromagnetic signals.Their geometry is typically long and slender their particularshape can be used in the design of computational methods. Onlyspecial modes are transmitted and eigenvalue and eigenvectoranalysis becomes important.We develop a . LÄS MER

  3. 2. Fundamental studies of non-premixed combustion in turbulent wall jets using direct numerical simulation

    Författare :Zeinab Pouransari; V. Arne Johansson; Christer Fureby; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbulence; non-premixed combustion; global reaction; direct numerical simulation; wall-jet; heat release; mixing scales; heat transfer; Other engineering mechanics; Övrig teknisk mekanik;

    Sammanfattning : The present thesis deals with the fundamental aspects of turbulent mixingand non-premixed combustion in wall-jet flows. Direct numerical simulations(DNS) of compressible turbulent flows are performed in a wall-jet configura-tion, which has a close resemblance to many industrial combustion applica-tions. LÄS MER

  4. 3. Strategic and operational capabilities in steel production : Product variety and performance

    Författare :Joakim Storck; Bengt Lindberg; Christer Johansson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel production; system dynamics; product variety; production strategy; cost models; Manufacturing engineering; Produktionsteknik;

    Sammanfattning : Steel producers that employ niche market strategies are continuously seeking to reduce production cost while maintaining adiverse product mix. The business model is typically based onmarketing of high–strength special or stainless steels. LÄS MER

  5. 4. Congruence between product strategy and manufacturing strategy : a framework for collaborative development

    Författare :Niklas Tjärnberg; Peter Gröndahl; Christer Johansson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Manufacturing engineering; Produktionsteknik;

    Sammanfattning : Today’s industries face an increasing global competition. Decision makers have to deal with different kinds of uncertainty, a complex business ecosystem, a high pace of change, and an unforgiving market when less than best decisions are made. One, among many others, approach that can lead to these better decisions is to have a strategy. LÄS MER