Sökning: "Joakim Sandström"

Hittade 5 avhandlingar innehållade orden Joakim Sandström.

  1. 1. Thermal boundary conditions based on field modeling of fires : Heat transfer calculations in CFD and FE models with special regards to fire exposure represented with adiabatic surface temperatures

    Författare :Joakim Sandström; Stephen Welch; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel Structures; Stålbyggnad;

    Sammanfattning : Combining computer fluid dynamic, CFD, models with finite element, FE, models to calculate temperature in fire exposed structures can reduce design temperatures in structures while still obtaining the level of structural fire safety stipulated by society. A better understanding of heat transfer and the concept of adiabatic surface temperatures, AST, the transition of data between models can be simplified and more accurate temperature predictions can be made. LÄS MER

  3. 2. Photodetachment of Negative Ions. Experimental Investigations of Threshold and Continuum Structures

    Författare :Joakim Sandström; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; electron correlation; resonance ionization spectroscopy; doubly excited states; electron affinity; accelerator mass spectrometry; photodetachment;

    Sammanfattning : In this thesis photodetachment studies of atomic negative ions where one or several electrons are detached from a negative ion are presented. Negative ions are unique objects since their formation and destruction mechanisms strongly depend on the correlated motion of the valence electrons. LÄS MER

  4. 3. Photodetachment studies of negative ions : resonant and non-resonant continuum structures

    Författare :Joakim Sandström; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photodetachment; negative ion; lasers; resonances; doubly excited states; electron correlation;

    Sammanfattning : .... LÄS MER

  5. 4. The life safety objective in structural fire safety design

    Författare :Joakim Sandström; Ulf Wickström; George Hadjisophocleous; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel Structures; Stålbyggnad;

    Sammanfattning : .... LÄS MER

  7. 5. Engineering Automotive Electronic Systems: Decision Support for Successful Integration

    Författare :Joakim Fröberg; Christer Norström; Kristian Sandström; Ian Gorton; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Integration; Automotive; Decision support; Electronic system; Systems engineering; Computer science; Datavetenskap; Computer Science; datavetenskap;

    Sammanfattning : The electronic system of a modern vehicle is essential to achieve a successful automotive product. Vehicle development is performed by integrating components that include embedded electronics from several suppliers.This thesis present results on the subject of integration of automotive electronic systems. LÄS MER