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Zespół Systemów i Urządzeń Energetyki Cieplnej
Research Potentialintensyfikacja wymiany ciepła, nowoczesne wymienniki ciepła, wysokotemperaturowe pompy ciepła, mikrosiłownie ORC i inne
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Katedra Aparatury i Maszynoznawstwa Chemicznego
Research Potential* zasobów, możliwości pozyskania, konwersji, magazynowania i transportu energii ze źródeł odnawialnych, w tym energii słonecznej i biopaliw * możliwości odzyskiwania energii odpadowej w procesach przemysłowych i sposoby jej zagospodarowania * opracowanie procesów technologicznych recyklingu materiałowego zużytych modułów i ogniw fotowoltaicznych * opracowanie procesów technologicznych recyklingu materiałowego zużytych opon samochodowych *...
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Zespół ekoinżynierii i silników spalinowych
Research PotentialWysokosprawne, proekologiczne napędy i systemy konwersji energii
Other results Pokaż wszystkie wyniki (46)
Search results for: NUSSELT NUMBER
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Local Nusselt number evaluation in the case of jet impingement
PublicationJet impingement still is one of demanding cases regarding computational fluid dynamics, due to its highly turbulent behaviour, with occurrence of turbulent-laminar transition. Even recently developed methods exhibit some drawbacks – RANS based simulations lack accuracy, LES and DNS based ones require too much computational time. Hybrid methods also exist, but their development and validation is in progress. Nevertheless, CFD application...
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Thermal and hydraulic phenomena in boundary layer of minijets impingement on curved surfaces
PublicationPresented work considers flow and thermal phenomena occurring during the single minijet impingement on curved surfaces, heated with a constant heat flux, as well as the array of minijets. Numerical analyses, based on the mass, momentum and energy conservation laws, were conducted, regarding single phase and two-phase simulations. Focus was placed on the proper model construction, in which turbulence and boundary layer modeling...
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Flow structure, heat transfer and scaling analysis in the case of thermo-magnetic convection in a differentially heated cylindrical enclosure
PublicationThe experimental, numerical and scaling analysis in the case of thermo-magnetic convection in a thermosyphon-like enclosure filled with a paramagnetic fluid is presented. Visualization of temperature field together with the numerical simulation gave an information about the flow structure, which indicated “finger-like” structures of hot and cold streams advecting each other. Their number depended on the Rayleigh number and also...
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Numerical simulation of natural convection of Glycol-Al2O3 nanofluids from a horizontal cylinder
PublicationThis paper deals with natural convection around a circular cylinder with constant heat flux in a cavity using computational fluid dynamics. As fluids ethylene glycol and a mixture of ethylene glycol with Al2O3 nanoparticles (mass concentrations of nanoparticles: 0.1% and 1%) are chosen. Rayleigh number ranges from 3104 to 3105. The nanofluids are modeled with single-phase approach. For the investigated range of nanoparticle concentration, the...
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Numerical Study of Turbulent Flow and Heat Transfer of Nanofluids in Pipes
PublicationIn this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (Reynolds number between 6000 and 12000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with experimental data. Ethylene glycol and water, 60:40 EG/W mass ratio, as base fluid and SiO2 nanoparticles are used as nanofluid...