Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Gas expansion"”.
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Influences of the Darrieus-Landau instability on premixed turbulent flames
… cusp-like structure pointing towards the burned gas region that propagates at a speed substantially large than the laminar flame speed. In this work, we present for the first time a systematic study of the bifurcation phenomena in the more realistic \textit{three-dimensional flow} and extend this …
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Mixing, mass transfer and energy analysis across bioreactor types in microalgal cultivation and lipid production
… Sparging is commonly used for mixing and gas-liquid mass transfer in photobioreactors, but is energy intensive. The aim of this work was to reduce these energy requirements by optimising conventional sparging and considering surface aeration coupled with mechanical agitation as an …
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Improvement and validation of a thermodynamic S.I. engine simulation code
… charge model was also developed. Burned gas expansion over the flame propagation period was shown to significantly change the unburned gas charge stratification from the initial variation. Two types of initial stratification (linear and parabolic distributions, rich of the centre and lean …
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Hydrodynamic stability of a premixed flame subjected to transverse shear
… of premixed combustion is caused by thermal gas-expansion, known as the hydrodynamic or the Darrieus-Landau (DL) instability. Consequently, a premixed flame is susceptible to disturbances. The flame tends to develop a wrinkled or corrugated front with a cusp-like structure at a large scale. …
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Improving the quality of non-wheat bread made from maize using sourdough fermentation
… and a more open crumb structure with large gas cells. This showed that the maize bread quality improvement was not due to low pH. Confocal laser scanning microscopy revealed a cohesive dough structure in the sourdoughs. Larger cells and a more uniform crumb structure were also observed in …
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Multi-scale modeling of laser induced breakdown in non-equilibrium plasmas
… discusses the modeling of breakdown of gases under nano-second laser discharges, the plasma kernel dynamics, the plasma core decay, and the subsequent post-dischargee hydrodynamics, together with some of its engineering applications (e.g., flow control and ignition of combustible …
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Exports of Iranian natural gas to regional and international markets: a study of political, legal and economic barriers
… critically examines exports of Iranian natural gas to regional and international markets. Owning the world’s 2nd largest proven natural gas reserves, Iran can potentially be considered a major gas exporter. Yet, stringent international sanctions, coupled with domestic politicisation of the …