Sökning: "oscillatory flow"

Visar resultat 1 - 5 av 29 avhandlingar innehållade orden oscillatory flow.

  1. 1. Numerical study of dense particle flows under planar shear

    Författare :Junhao Dong; Beräkningskemi; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dense suspension; granular flow; shear thickening; oscillatory flow; rheology; Discrete element method;

    Sammanfattning : In this thesis I conducted numerical simulations to study the flow behavior of dense particle flows composed of hard particles under planar shear using the discrete element method. The simulations were carried out in two dimensional systems, where the particles are modelled as circular discs. The discs are non-Brownian and neutrally buoyant. LÄS MER

  3. 2. Control of oscillatory thermocapillary convection

    Författare :Junichiro Shiomi; KTH; []
    Nyckelord :Fluid mechanics; control; thermocapillary convection;

    Sammanfattning : The possibility to stabilize the oscillatory thermocapillaryconvection is demonstrated using a proportional feedbackcontrol. This topic has a strong industrial motivation inconnection with a container-less crystal growth method calledthe floating-zone technique. LÄS MER

  4. 3. Turbulent Flow in Constricted Blood Vessels : Quantification of Wall Shear Stress Using Large Eddy Simulation

    Författare :Roland Gårdhagen; Matts Karlsson; Toste Länne; Leif Rune Hellevik; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : The genesis of atherosclerosis has previously been shown to be affected by the frictional load from the blood on the vessel wall, called the wall shear stress (WSS). Assessment of WSS can therefore provide important information for diagnoses, intervention planning, and follow‐up. LÄS MER

  5. 4. A numerical study of two-fluid models for dispersed two-phase flow

    Författare :Reynir Levi Gudmundsson; Björn Sjögreen; Anders Petersson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Numerical analysis; two-phase flow; two-fluid mode; well-posedness; numerical experiments; Numerisk analys; Numerical analysis; Numerisk analys;

    Sammanfattning : In this thesis the two-fluid (Eulerian/Eulerian) formulation for dispersed two-phase flow is considered. Closure laws are needed for this type of models. We investigate both empirically based relations, which we refer to as a nongranular model, and relations obtained from kinetic theory of dense gases, which we refer to as a granular model. LÄS MER

  7. 5. Flow dynamics in corrugated pipes: Effect on particle agglomeration

    Författare :Ghulam Mustafa Majal; Mihai Mihaescu; Mats Åbom; Lisa Prahl Wittberg; Mikael Karlsson; José Galindo; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Mechanics; Teknisk mekanik;

    Sammanfattning : In recent times, the deleterious impact of particulate emissions from road vehicles on the well-being of humans has garnered a significant amount ofattention. Regulatory bodies have enacted legislation in order to counter act particulate emissions. LÄS MER