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Detailed CFD models of mineral insulated metal sheath (MIMS) thermocouples are discussed and thermocouple readings in clean flames are verified against experimental thermocouple data for a Hencken burner flame available in the literature. Computational results present thermocouple temperature readings as functions of thermocouple insertion depth in three-dimensional directions. Computational temperature correlations are plotted against non-dimensional insertion depth and insertion height above burner. Overall, predictions showed excellent agreement with experimental data. Deviations occurred...
This paper treats the investigation of the complex internal flow in Sirocco type fans by means of both numerical and experimental methods. In order to improve the design and efficiency of these fans, Computational Fluid Dynamics (CFD) with high-quality, high-resolution structured and unstructured grids are used. Simulations are verified by both integral measurements at a high-precision chamber test rig according to ISO 5801 and by means of Stereoscopic Particle Image Velocimetry (Stereoscopic PIV). Comparison between numerical and experimental data shows a high consistency. Performance curves...
In the present paper the design process of a stabilizer fin is presented. Different computational tools were adopted: a two-dimensional panel-code was used to design the two-dimensional airfoil candidates and an optimizer based on genetic algorithms was used to choose the optimum airfoil. A panel-code and a Navier- Stokes solver were successively adopted to verify the three-dimensional design. The two codes showed similar results at low angle of attacks, but differences enlarged when the angle of attack increased. The fins are also adopted as zero-speed stabilizing fins. The torque moment at...
The present work follows on from a successful validation study into the use of 3D CFD with advanced turbulence modeling to predict narrowband and broadband flow noise in a rectangular cavity (L/D=5,W/D=1) at M=0.85. In the present study, this body of work is extended in three ways: first, from the transonic case to a range of flow speeds, from subsonic through to supersonic, M=0.6 to 1.35. Secondly, comparison is made between three DES variants; two of which are frequently referenced in the literature, namely Spalart-Allmaras and k-ω-SST, and our own variant based on the standard k-ε model as...
A new meshing method for fixed beds consisting of monodisperse spherical particles is presented. The particles are flattened near the particle–particle and particle–wall contact points, respectively, to avoid bad cell qualities. Compared to known methods from literature the modifications are so small that a subsequent correction of these modifications is not necessary. CFD simulations are performed for tube to particle diameter ratios of 3 ≤ D / d ≤ 10 in the laminar, transitional and turbulent flow regime and are compared with results from literature concerning porosity and pressure drop...
Team CTU Cartech has taken part in this year Formula Student competitions with third car-prototype called FS.03. Our intension was to reach the top ten at least in one competition. In order to achieve our goals we aimed to improve our overall team performance trough disciplines. We are sure that CFD simulations are important part of the design process, because they can improve the car performance at the track and team presentation during the design event. CFD can be used in Formula Student for the following areas · Aerodynamics · Engine performance · Heat transfer. With the help of STAR-CCM...
Neutronic coupling with Computational Fluid Dynamics (CFD) has been under development within the US DOE sponsored “Nuclear Simulation Hub”. The method of characteristics (MOC) neutronics code DeCART (, ) under development at the University of Michigan was coupled with the CFD code STAR-CCM+ to achieve more accurate predictions of fuel assembly performance. At Westinghouse, lower order, neutronic codes such as the nodal code ANC have been coupled to thermal-hydraulics codes such the subchannel code VIPRE to predict the heat flux and fuel nuclear behavior. However, a more detailed neutronics...
Understanding airflow in buildings is essential for improving energy efficiency, controlling airborne pollutants and maintaining occupant comfort. Recent research on whole‑building airflow simulation has turned towards protecting occupants from threats of chemical or biological agents. Sample applications include helping design systems to reduce exposure and selecting optimal sensor locations.

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