Sökning: "viscoelastic measurements"

Visar resultat 6 - 10 av 58 avhandlingar innehållade orden viscoelastic measurements.

1. 6. Experimental studies of large particles in Newtonian and non-Newtonian fluids

   Författare :Sagar Zade; Luca Brandt; Fredrik Lundell; Ellen Longmire; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; turbulence; finite-size; particle-laden flows; duct flow; pipe flow; viscoelastic fluid; viscoplastic fluid; Engineering Mechanics; Teknisk mekanik;

   Sammanfattning : In everyday human life, laminar flow is arguably an exception whereas turbulent flow is the norm. Yet, the former has been much better understood, naturally since laminar flow renders itself to treatment in a relatively easier fashion compared to turbulence with its chaotic dynamics across multiple scales in space and time. LÄS MER

3. 7. Mircostructure and rheological properties of concentrated tomato suspensions during processing

   Författare :Elena Bayod; Livsmedelsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rheology; microstructure; morphology; flocs; tomato paste; ketchup; fibre suspensions; viscoelastic properties; particle size distribution; time dependency; network; yield stress; wall slip; Mooney; Cox-Merz rule; Tikhonov; tube viscometer; rotational viscometer; homogenisation; shearing;

   Sammanfattning : Food processing comprises operations such as dilution (changing the concentration), homogenisation (changing the particle size), and subsequent pumping (shearing), among others. It is thus of great interest to gain a better understanding of the mechanisms governing the creation and disruption of structures during these engineering operations, and the way in which they are related to the textural and rheological properties of the material. LÄS MER

4. 8. Development of a Novel QCM Technique for Protein Adsorption Studies

   Författare :Fredrik Höök; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; viscoelastic effects; myoglobin; QCM; hemoglobin; ferritin; dissipation factor; protein adsorption; conformational changes;

   Sammanfattning : The first part of this thesis (Papers I and II) is concentrated on the development of a novel quartz crystal microbalance (QCM) technique to study protein adsorption. The second part (Papers III-V) is focused on the application of the technique on protein adsorption using well characterized surface-solution-protein systems. LÄS MER

5. 9. Extensional rheometry through hyperbolic contraction

   Författare :Magda Nyström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dysphagia; Boger fluid; hyperbolic contraction flow; extensional rheology; axisymmetric contraction–expansion; numerical simulation; Viscoelastic fluid; pressure drop;

   Sammanfattning : To understand fluid rheology, properties such as consistency and viscosity are determined in both shear and extensional flow. Many commonly-used materials and formulations exhibit complex rheological properties and in order to determine the behaviour as well as predict and govern their properties, effective and reliable characterisation of these fluids is important. LÄS MER

7. 10. Dynamic Soil-Structure Interaction Analysis of Railway Bridges : Numerical and Experimental Results

   Författare :Abbas Zangeneh Kamali; Costin Pacoste; Raid Karoumi; Geert Lombaert; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railway Bridge; Soil-Structure Interaction; Full FE modeling; Simplified modeling; Coupled FE-BE modeling; Field measurements; Model updating; Civil and Architectural Engineering; Byggvetenskap;

   Sammanfattning : The work reported in this thesis presents a general overview of the dynamic response of short-span railway bridges considering soil-structure interaction. The study aims to identify the effect of the surrounding and underlying soil on the global stiffness and damping of the structural system. LÄS MER