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Analysis of the Coffee Roasting Process under Actual Operating Conditions
This analysis investigates the fluid dynamics behaviour of the pneumatic system for a coffee roasting plant and particular attention is devoted to the roasting process of the coffee beans. A numerical model is constructed to simulate the complete thermo-pneumatic system that is employed in a reference plant. The numerical tool includes a predictive model for the simulation of the heat and mass transfer between the hot air flow and the coffee beans in order to estimate the coffee roasting process. Thus, submodels for the evaporation of the coffee moisture content and the coffee reactions due...
Use of Numerical Modeling to Improve the Performance of Night Ventilation
This presentation will show how STAR-CCM+ software can be used to increase the performance of night ventilation in a courtyard house. Night ventilation is one of the passive cooling methods which are used in buildings, and it depends on the use of renewable-energy sources for cooling purposes. This method is usually used in traditional courtyard houses in places with hot dry climates. The attention for such a type of house is increasing due to the global shortage of energy supplies. The performance depends on many factors, but some of them intersect with other building requirements. For...
Stadium Design for Enhanced Cooling
Many outdoor sports facilities in the world are in climates where the external conditions are uncomfortable. Ideally, these stadia would not come with restrictions on when they can be used (time of day, seasonally) and how they can be used (play duration). However, both heat stress and wind chill become factors in the play of the game. In cold climates, the objective is to keep winds out. In hot climates, the objective can be to either maximize ventilation - for cooling purposes - or minimize wind infiltration if active measures or thermal mass based passive measures are to be used for...
Annual Building Energy Simulation with STAR-CCM+
According to the Institute for Energy of the European Commission Joint Research Centre, HVAC (Heating, Ventilation and Air Conditioning) accounted for 11% of the EU electricity consumption in 2007. Annual energy simulations of buildings are increasingly being used for optimization of energy consumption. These simulations primarily rely on one-dimensional methods. Computational Fluid Dynamics on the other hand are generally utilized in building applications among others for predicting thermal comfort and developing HVAC components. Currently annual CFD simulation of one room or even an entire...
Annual Building Energy Simulation with STAR-CCM+
According to the Institute for Energy of the European Commission Joint Research Centre, HVAC (Heating, Ventilation and Air Conditioning) accounted for 11% of the EU electricity consumption in 2007. Annual energy simulations of buildings are increasingly being used for optimization of energy consumption. These simulations primarily rely on one-dimensional methods. Computational Fluid Dynamics on the other hand are generally utilized in building applications among others for predicting thermal comfort and developing HVAC components. Currently annual CFD simulation of one room or even an entire...
Streamlining Aircraft Icing Simulations
Aircraft icing is a major concern in aircraft development because it can degrade aerodynamic and engine performance, produce false indications on flight instruments, and prevent correct operation of control surfaces, landing gear, and brakes. This presentation will discuss simulation of aircraft icing topics, from design of thermal ice protection systems to prediction of accreted ice shapes and performance degradation. Various challenges, modeling approaches, and results will be presented. Historically, such simulations have been rather segmented, with much time and effort spent passing...
Numerical Aero-Thermal Investigation for a Science Payload in a Dust Devil Boundary-Layer on Mars
NASA Discovery Program mission - planned for a March 2016 launch - that will place a single geophysical lander in the southern Elysium region of Mars to study its deep interior
The noise of radial fans with Forward-Curved (FC) blades, which are used in the automotive industry as well as HVAC applications, is associated with a dominant tonal noise that stems from the interaction between the unsteady flow leaving the impeller passages and the volute tongue (cut-off). Reducing the tonal noise in FC fans is a challenging task, considering the fact that the optimum operation of this type of fan is completely dependent on employing a properly designed scroll-housing. Performing CFD simulations not only helps us to understand the flow characteristics of this type of fan,...
Unsteady phenomena in HP turbines are caused by interaction of spatially non-uniform field of the gas flow parameters downstream of the NGV with the rotating blades of the rotor wheel. This presentation details the use of the harmonic balance method in STAR-CCM+ to solve problems of unsteady interaction of the hot streams downstream of the combustion chamber with the rotating blades of the rotor wheel. The hot streams downstream of the combustion chamber are caused by discrete circumferentially located fuel nozzles and openings for air supply to the combustion chamber mixing zone. Unsteady...
Radial inflow turbines are subjected to high engine order excitation that causes high cycle fatigue. In order to fulfill endurance and integrity requirements, it is necessary to determine the high engine order excitation that depends on structural as well as aerodynamic operating conditions. The lifetime limiting dynamic stresses induced by blade vibration due to high engine order excitation can be estimated by evaluating the forced response function of the tuned system. In order to calculate the forced response function, it is necessary to predict aerodynamic excitation forces and...

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