Sökning: "order flows"

Visar resultat 1 - 5 av 460 avhandlingar innehållade orden order flows.

  1. 1. There and back again... An Earth magneto-tale : understanding plasma flows in the magnetotail

    Författare :Alexandre De Spiegeleer; Maria Hamrin; Herbert Gunell; Timo Pitkänen; Colin Forsyth; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plasma dynamics; Earth magnetosphere; magnetotail; plasma sheet flows; oscillatory flows; burst bulk flows; tailward flows; rymdfysik; Space Physics; rymd- och plasmafysik; Space and Plasma Physics;

    Sammanfattning : On average, the Earth's magnetotail plasma sheet seems to be a calm region of the magnetosphere where the plasma moves slowly towards Earth. However, the plasma sheet actually hosts many phenomena, some of which can affect Earth. LÄS MER

  3. 2. Stadens gränsplatser : Kungliga Poliskammaren och vardagens omstridda rum i Stockholm, 1776–1835

    Författare :Tobias Osvald; Dag Lindström; Henrik Ågren; Magnus Linnarsson; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Police; policing; borders; Stockholm; urban space; public; private; 18th century; 19th century; contestation; negotiation; everyday life; micro-geographies; homelessness; sleeping rough; keeping pub; sanitation; order; control; social practice theory; flows; transgressions; closure; stabilization; movement; Historia; History;

    Sammanfattning : This dissertation explores the interaction between the inhabitants of Stockholm and the constables of the Royal Police Chamber—Sweden’s first police force—during a period in the city’s history that is associated with stagnation from the perspectives of demography and economy. The aim is to understand how space was negotiated and changed over time through everyday interactions and practices. LÄS MER

  4. 3. Urban heavy metals : Stocks and flows

    Författare :Louise Sörme; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Heavy metais; urban areas; Substance flow analysis; inflow; stock; outflow; diffuse emisson; waste; wastewater treatment plant; legislation; Tungmetaller; miljöaspekter; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : Levels of heavy metals in different media are high today, both in Stockholm and other urban areas. Where do the metals come from? Production emissions and point sources are not the answer, since earlier research has shown that production emissions are lower than emission from goods during use (the diffuse emission). LÄS MER

  5. 4. Turbine Outlet Guide Vane Flows

    Författare :Johan Hjärne; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spalart-Allmaras model; k-ω SST model; linear cascade; secondary flows; turbine exhaust casing; RSM; k-ε realizable model; turbine rear frame; engine mount bump; tail bearing housing; Outlet guide vane;

    Sammanfattning : New design goals on modern jet engines often leads to more highly loaded turbines with fewer stages in order to save weight and cost. This gives higher swirl angles into the outlet guide vane (OGV), implying a more difficult aerodynamic design. LÄS MER

  7. 5. A new high-order method for direct numerical simulations of turbulent wall-bounded flows

    Författare :Peter Lenaers; Arne Johansson; Hans Kuerten; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Incompressible wall-bounded flows; direct numerical simulations; high-order; compact finite differences; collocated grid; influence matrix method;

    Sammanfattning : A new method to perform direct numerical simulations of wall-bounded flows has been developed and implemented. The method uses high-order compact finite differences in wall-normal (for channel flow) or radial direction (for pipe flow) on a collocated grid, which gives high-accuracy results without the effectfof filtering caused by frequent interpolation as required on a staggered grid. LÄS MER