Search for dissertations about: "reologi"

Showing result 1 - 5 of 11 swedish dissertations containing the word reologi.

2. 1. Anaerobic Digester Fluid Rheology and Process Efficiency : Interactions of Substrate Composition, Trace Element Availability, and Microbial Activity

   Author : Luka Šafarič; Annika Björn; Sepehr Shakeri Yekta; David Bastviken; David C Stuckey; Linköpings universitet; []
   Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Anaerobic digestion; biogas; rheology; trace elements; microbiology; Anaerob rötning; biogas; reologi; spårämnen; mikrobiologi;

   Abstract : As the anthropogenic greenhouse gas emissions continue imposing stress on our environment, it is becoming increasingly important to identify and implement new renewable technologies. Biogas production through anaerobic digestion has a great potential, since it links waste treatment with extraction of renewable energy, enabling circular bio-economies that are vital for a sustainable future. READ MORE

4. 2. Numerical Modelling of Self-Compacting Concrete Flow : Discrete and Continuous Approach

   Author : Annika Gram; Johan Silfwerbrand; Ali Farhang; Mette R. Geiker; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SCC; rheology; Simulation of Flow; Simulering; Flöde; Självkompakterande Betong; Reologi; Construction materials; Konstruktionsmaterial;

   Abstract : With the advent of Self-Compacting Concrete (SCC) that flows freely, under the soleinfluence of gravity, the wish for hassle-free and predictable castings even in complexcases, spurged the simulation of concrete flow as a means to model and predictconcrete workability. To achieve complete and reliable form filling with smoothsurfaces of the concrete, the reinforced formwork geometry must be compatible withthe rheology of the fresh SCC. READ MORE

5. 3. On droplet interactions and suspension flow

   Author : Zhouyang Ge; Luca Brandt; François Gallaire; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; droplets; suspension; multiphase flow; microfluidics; soft matter; rheology; depletion force; level set; ghost fluid.; droppar; suspension; flerfasflöde; mikrofluidik; mjukt material; reologi; utarmningskraft; nivåuppsättning; spökvätska.; Teknisk mekanik; Engineering Mechanics;

   Abstract : Micron to millimetre sized droplets, precisely generated or sustained in controlled environment, have great potential in myriads of engineering applications functioning as the basic element to assemble metamaterials, deliver drugs, host surfactant, reduce friction and damp turbulence. The interaction of droplets from pairwise to collective levels is the most important factor in controlling these processes, yet little is known about the detailed mechanisms in various nonideal conditions. READ MORE

6. 4. Numerical study of particle suspensions in Newtonian and non-Newtonian fluids

   Author : Dhiya Alghalibi; Luca Brandt; Metin Muradoglu; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; inertial suspensions; rheology; non-Newtonian fluids; visco-elastic; sedimentation; deformable particle; hyper-elastic.; tröghetsbehäftad suspension; reologi; icke-Newtonska fluider; vis- koelastik; sedimentering; deformerbara partiklar; hyperelastik; Engineering Mechanics; Teknisk mekanik;

   Abstract : Solid or deformable particles suspended in a viscous fluid are of scientific and technological interest in a broad range of applications. Pyroclastic flows from volcanoes, sedimentation flows in river bed, food industries, oil-well drilling, as well as blood flow in the human body and the motion of suspended micro-organisms in water (like plankton) are among the possible examples. READ MORE

7. 5. Colloidal Processing and Alignment of Wood-Based Dispersions and Hybrid Functional Foams

   Author : Seyed Ehsan Hadi; Lennart Bergström; Daniel Söderberg; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wood-based nanomaterials; process-structure-property relationships; nanocellulose; lignocellulose nanofibers; rheology; small-angle X-ray scattering; lignin; tannic acid; unidirectional ice-templating; foams; aerogels; sustainability; träbaserade nanomaterial; process-struktur-egenskapsrelationer; nanocellulosa; lignocellulosananofibrer; reologi; småvinkelröntgenstrålning; lignin; garvsyra; riktad isstrukturering; skum; aerogeler; hållbarhet; materialkemi; Materials Chemistry;

   Abstract : This thesis presents novel methods and approaches for designing, preparing/fabricating, and characterizing wood-based nanomaterials. It investigates how modifications in structure, process variables, and composition can enhance functional properties. READ MORE