Sökning: "volume fractions"

Visar resultat 11 - 15 av 107 avhandlingar innehållade orden volume fractions.

  1. 11. Moisture and Chloride Transport in Concrete

    Författare :Filip Nilenius; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multiscale modelling; mass transport; coupled diffusion; statistical volume element; interfacial transition zone.; computational homogenization; mesoscale;

    Sammanfattning : Material properties pertaining to the physical phenomena of mass transport in concrete are important for the durability of concrete structures, and they can ultimately be derived from material heterogeneities found at different subscales. On the mesoscale level, these heterogeneities are mainly characterized by the presence of embedded aggregates in the cement paste, together with cracks. LÄS MER

  3. 12. Radiative Heat Transfer in Suspension-Fired Systems

    Författare :Adrian Gunnarsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; co-firing; rotary kiln; combustion; Radiative heat transfer; soot volume fraction;

    Sammanfattning : Radiation is the dominating heat transfer mechanism in most furnaces, and the radiative properties of combustion products represent important aspects regarding its suitability as a heat source. However, fuel and energy markets are undergoing rapid changes due to increasing concerns related to the security of supply and increased global warming. LÄS MER

  4. 13. Study of solidification and volume change in lamellar cast iron with respect to defect formation mechanisms

    Författare :Péter Svidró; Pär Jönsson; Pål Schmidt; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lamellar cast iron; shrinkage porosity; solidification; volumetric change; dendrite coherency; inter-dendritic space;

    Sammanfattning : Lamellar cast iron is a very important technical alloy and the most used material in the casting production, and especially in the automotive industry which is the major consumer. Beside the many great properties, it is inclined to form casting defects of which some can be prevented, and some may be repaired subsequently. LÄS MER

  5. 14. Towards better practices in detection of wastewater pollution in stormwater sewers and volume estimation of SSO discharges

    Författare :Oleksandr Panasiuk; Sveinung Sægrov; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering;

    Sammanfattning : Separate sewerage systems are designed so that the wastewater and stormwater are carried separately. However, in practice, untreated wastewater discharges to receiving waters are not that rare, impairing the quality of the receiving waters and increasing the risks to public health and aquatic organisms. LÄS MER

  7. 15. Migration of molecules in the brain : focus on the extracellular space and the cerebrospinal fluid

    Författare :Malin Höistad; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Volume transmission; rat; diffusion; striatum; dual-probe microdialysis; delivery; recovery; clearance; uptake; dopamine; metabolism; radiotracer; mannitol; cisterna magna; opioids; peptides; betaendorphin; mu-opioid receptors; mismatch; TH; DBH; immunohistochemistry; fear.;

    Sammanfattning : Three different molecules and three different experimental models were used to study the migration of molecules in the rat brain: a neurotransmitter- dopamine, an extracellular market- mannitol, and a neuropeptide beta-endorphin. Two models in vivo were used to study the diffusion and migration of molecules: dual-probe rnicrodialysis in the striatum, and direct intrastriatal microinjections followed by cerebrospinal fluid sampling from the cisterna magna. LÄS MER