Search Results - "Almbauer, Raimund"

A Semi-implicit Treatment of Porous Media in Steady-State CFD by Domaingo, Andreas, Langmayr, Daniel, Somogyi, Bence, Almbauer, Raimund

“…There are many situations in computational fluid dynamics which require the definition of source terms in the Navier–Stokes equations. These source terms not…”
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Evaluation of GRAL for the pollutant dispersion from a city street tunnel portal at depressed level by Oettl, Dietmar, Sturm, Peter, Almbauer, Raimund

“…A new data set for evaluation of atmospheric dispersion models, designed to treat road tunnel portals, is presented. Further, the performance of GRAL 3.5 (Graz…”
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Usage and validation of a fluid structure interaction methodology for the study of different suction valve parameters of a hermetic reciprocating compressor by Lang, Wolfgang, Almbauer, Raimund, Jajcevic, Dalibor

“…The dynamics of the flatter valves inside a hermetic reciprocating compressor used in household appliances is the most important factor concerning the gas…”
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Multi-Response optimization applied to a mechanically assisted reed valve of a hermetic reciprocating compressor by Egger, Andreas, Almbauer, Raimund, Dür, Lukas, Hopfgartner, Johann, Lang, Michael

“…•novel valve concept to improve variable speed compressors.•simultaneous improvement of efficiency, cooling capacity and reliability.•significant reduction of…”
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Transient cycle simulation of domestic appliances and experimental validation by Heimel, Martin, Berger, Erwin, Posch, Stefan, Stupnik, Axel, Hopfgartner, Johann, Almbauer, Raimund

“…•A transient model for simulating a domestic freezer is proposed.•The submodels compressor, compartment, heat exchangers and capillary are explained.•Steady…”
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Numerical simulation of spray break-up from cavitating nozzle flow by combined Eulerian–Eulerian and volume-of-fluid methods by Edelbauer, Wilfried, Kolar, Patrick, Schellander, David, Pavlovic, Zoran, Almbauer, Raimund

“…The present study shows new results from the recently proposed method for numerical simulations of the spray break-up of cavitating liquid jets. A…”
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Transient 1D heat exchanger model for the simulation of domestic cooling cycles working with R600a by Berger, Erwin, Posch, Stefan, Heimel, Martin, Almbauer, Raimund, Eichinger, Martin, Stupnik, Axel

“…Generally, domestic refrigerators and freezers are running in non-continuous operation mode most of the time, which is a necessity to match cooling capacity to…”
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Reed Valve CFD Simulation of a 2-Stroke Engine Using a 2D Model Including the Complete Engine Geometry by Jajcevic, Dalibor, Almbauer, Raimund, Schmidt, Stephan, Glinsner, Karl, Fitl, Matthias

“…CFD has been widely used to predict the flow behavior inside 2-stroke engines over the past twenty years. Usually a mass flow profile or a simple 0D model is…”
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Dispersion from road tunnel portals: comparison of two different modelling approaches by Oettl, Dietmar, Sturm, Peter, Almbauer, Raimund, Okamoto, Shin’ichi, Horiuchi, Kenji

“…Two different models for the dispersion of tunnel exhausts are compared with each other. The first model was developed in Japan by several research…”
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A simple model for the dispersion of pollutants from a road tunnel portal by Oettl, Dietmar, Sturm, Peter Johann, Bacher, Michael, Pretterhofer, Gerhard, Almbauer, Raimund Alfons

“…The dispersion of pollutants from a roadway tunnel portal is mainly determined by the interaction between the ambient wind and the jet stream from the tunnel…”
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Evaluation of a Gaussian and a Lagrangian model against a roadside data set, with emphasis on low wind speed conditions by Oettl, Dietmar, Kukkonen, Jaakko, Almbauer, Raimund Alfons, Sturm, Peter Johann, Pohjola, Mia, Härkönen, Jari

“…The evaluation of the high percentiles of concentration distributions is required by most national air quality guidelines, as well as the EU directives…”
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Transient 1D heat exchanger model for the simulation of domestic cooling cycles working with R600a by Berger, Erwin, Posch, Stefan, Heimel, Martin, Almbauer, Raimund, Eichinger, Martin, Stupnik, Axel

“…Generally, domestic refrigerators and freezers are running in non-continuous operation mode most of the time, which is a necessity to match cooling capacity to…”
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Lagrangian Dispersion Modeling of Vehicular Emissions from a Highway in Complex Terrain by Oettl, Dietmar, Sturm, Peter Johann, Pretterhofer, Gerhard, Bacher, Michael, Rodler, Johannes, Almbauer, Raimund Alfons

“…Transit traffic through the Austrian Alps is of major concern in government policy. Pollutant burdens resulting from such traffic are discussed widely in…”
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Application of Computational Methods for the Determination of Traffic Emissions by Sturm, Peter J., Almbauer, Raimund, Sudy, Christoph, Pucher, Karl

“…Road traffic is a dominant source of urban air pollution. Therefore, it is necessary to quantify emission levels as accurately as possible. In this paper, an…”
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Determination of traffic emissions—intercomparison of different calculation methods by Sturm, Peter J., Pucher, Karl, Sudy, Christoph, Almbauer, Raimund A.

“…This paper offers an overview of methods which may realistically be used, depending on the specific needs and accuracy required, to describe the emission…”
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Determination of traffic emissionsAintercomparison of different calculation methods by Sturm, Peter J, Pucher, Karl, Sudy, Christoph, Almbauer, Raimund A

“…This paper offers an overview of methods which may realistically be used, depending on the specific needs and accuracy required, to describe the emission…”
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A New Method to Estimate Diffusion in Stable, Low-Wind Conditions by Oettl, Dietmar, Almbauer, Raimund Alfons, Sturm, Peter Johann

“…Sonic anemometer observations were made 10 m above ground level for a period of 1 yr. From these data, Eulerian autocorrelation functions were computed for the…”
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