Sökning: "divergence free"

Visar resultat 1 - 5 av 23 uppsatser innehållade orden divergence free.

1. 1. SECOND-ORDER DIVERGENCE-FREE FEM FOR MAGNETOHYDRODYNAMICS USING LAGRANGE POLYNOMIALS

   Kandidat-uppsats, Uppsala universitet/Institutionen för informationsteknologi

   Författare :Erik Björklund; Peter Mårtensson; Noah Waltman; [2023]
   Nyckelord :;

   Sammanfattning : AbstractMaxwell’s laws state that the divergence of a magnetic field always remains zero. In thecontinuous setting this is true for the magnetohydrodynamics equations. However, in thediscrete setting, the solution does not always remain divergence-free. LÄS MER

3. 2. Djurförsäkringen ur ett konsumentperspektiv

   Uppsats för yrkesexamina på avancerad nivå, Stockholms universitet/Juridiska institutionen

   Författare :Angelica Ruuth; [2023]
   Nyckelord :pet insurance; insurance; dog insurance; cat insurance; djurförsäkring; försäkring; hundförsäkring; kattförsäkring;

   Sammanfattning : The longstanding companionship between humans and pets, particularly cats and dogs, has evolved to the point where they are considered integral members of the family. However, despite their elevated status in our lives, the legal classi- fication of pets as objects remains prevalent in insurance law. LÄS MER

4. 3. Monitoring of heat exchanges in thesnowpack of Foxfonna glacier, Spitzbergen,Svalbard.

   Kandidat-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

   Författare :Thibault Desjonquères; [2022]
   Nyckelord :Glaciers; Glaciology; Svalbard; Geophysics; Superimposed Ice; Foxfonna; Geology.; Physics and Astronomy;

   Sammanfattning : The processes of meltwater storage in firn and the impact of refreezing on firn-coveredglaciers have been investigated on the Greenland ice-sheet. On Svalbard, climate changepromotes the disappearance of firn on glaciers. LÄS MER

5. 4. High-performance implementation of H(div)-conforming elements for incompressible flows

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för beräkningsvetenskap

   Författare :Niklas Wik; [2022]
   Nyckelord :Finite elements; H div -conforming; incompressible flows; incompressible Navier-Stokes equations; high-performance; matrix-free; Raviart-Thomas;

   Sammanfattning : In this thesis, evaluation of H(div)-conforming finite elements is implemented in a high-performance setting and used to solve the incompressible Navier-Stokes equation, obtaining an exactly point-wise divergence-free velocity field. In particular, the anisotropic Raviart-Thomas tensor-product polynomial space is considered, where the finite element operators are evaluated with quadrature in a matrix-free fashion using sum-factorization on tensor-product meshes. LÄS MER

7. 5. Asynchronous Divergence-Free Smoothed Particle Hydrodynamics

   Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för programvaruteknik

   Författare :Theo Holmqvist Berlin; [2021]
   Nyckelord :SPH; regional time stepping; divergence free; simulation;

   Sammanfattning : Background. Fluid simulation is an area of ongoing research. In recent years, simulators have become more realistic and stable, partly by employing the condition of having divergence-free velocity fields. A divergence-free velocity field is a strict constraint that requires a high level of correctness in a simulation. LÄS MER