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In this work, we present an unsteady flamelet progress variable approach for diesel engine CFD combustion modelling. The progress variable is based on sensible enthalpy integrated over the flamelet and describes the transient flamelet ignition process. By using an unsteady flamelet library for the progress variable, the impact of local effects, for example variations in the turbulence field, effec

One-dimensional pulse propagation in temporally dispersive dielectrics is analyzed using a scalar, causal fundamental solution of the dispersive wave operator (a single, retarded Green’s function). A number of exact solutions for normal incidence on dispersive half-spaces are given, and these solutions are compared to time-domain numerical results and to forerunners (precursors).

Why is the notion of experience so relevant for feminist theory? How has the concept been used and by whom? What are the theoretical and political implications of postmodern theory for a re-thinking of the concept? In these pages we will explore the uses and abuses of the concept of experience in contemporary feminist thought through the works of influential feminist intellectuals. This article ha

NERICA is a new group of high-yielding and stress-tolerant upland rice varieties, developed by the Africa Rice Center to address the continent-wide rice challenge, poverty and food insecurity. Recognizing that African women farmers do not always benefit from the introduction of productivity-enhancing technology and higher-value crops, the aim of my thesis is to understand processes leading to NERI

For the simultaneous evaluation of the influence on engine knock of both chemical conditions and global operating parameters, a combined tool was developed. Thus, a two-zone kinetic model for SI engine combustion calculation (Ignition) was implemented into an engine cycle simulation commercial code. The combined model predictions are compared with experimental data from a single-cylinder test engi

Today’s multimedia systems use different types of media with different play-out devices. Currently we are heading towards a situation where for example cellular content providers, the home entertainment industry and networked multimedia over the Internet provide different content and dirferent formats that are incompatible with devices from the other systems. This is in stark contrast with the cur

I detta utkast analyseras forskningsprocessens olika steg, från problemformulering till analys av data, och de kritiska val man ställs inför. Den empiriska delen bygger på observationer i Ljubija, en stad i nordvästra Bosnien, tidningsartiklar från området samt fjorton intervjuer. Känslorna under fältarbetet diskuteras.