Search results for "CFD"
showing 10 items of 249 documents
Simulazioni Numeriche del Campo di Moto e della Caduta di Pressione in Tubi Elicoidali
2009
Unsteady Turbulence: Phenomena and Modelling
2010
Filtering of the Navier-Stokes Equations in the Context of Time-Dependent Flows
1998
OTTIMIZZAZIONE FLUIDO-MECCANICA DI TURBINE IDRAULICHE CROSSFLOW
2021
NUMERICAL ANALYSIS OF AN ALTERNATIVE VENTILATION SYSTEM AND COMPARISON WITH TRADITIONAL ONE FOR BOTH FULL AND REDUCED-SCALE ROAD TUNNEL
Suitability of the VOF Approach to Model an Electrogenerated Bubble with Marangoni Micro-Convection Flow
2022
When a hydrogen or oxygen bubble is created on the surface of an electrode, a micro-convective vortex flow due to the Marangoni effect is generated at the bottom of the bubble in contact with the electrode. In order to study such a phenomenon numerically, it is necessary to be able to simulate the surface tension variations along with a liquid-gas interface, to integrate the mass transfer across the interface from the dissolved species present in the electrolyte to the gas phase, and to take into account the moving contact line. Eulerian methods seem to have the potential to solve this modeling. However, the use of the continuous surface force (CSF) model in the volume of fluid (VOF) framew…
SVILUPPO DI METODOLOGIE DI PROGETTAZIONE INTEGRATA PER BARCHE A VELA DA COMPETIZIONE
2021
In questo lavoro di tesi sono presi in esame i metodi di progettazione integrata con riferimento al disegno nautico delle piccole imbarcazioni a vela da competizione. La progettazione di una barca a vela, in tutte le sue parti, è un processo molto complesso in quanto richiede una profonda esperienza in questo campo ed inoltre necessita di diverse competenze dal punto di vista tecnico in aree anche molto distanti tra loro. Nella vita di tutti i giorni spesso risolviamo problemi relativamente semplici e quindi troviamo la soluzione anche in modo intuitivo, in ingegneria solitamente si affrontano problemi un po’ più complessi e seguire una procedura strutturata aiuta molto per trovare soluzion…
Liberty winter gardens in Palermo: contamination from solar design
2020
At the end of the 19th century, the city of Palermo boasted a tradition of steel elements that could include the most beautiful railings and light steel structures of the time. The paper shows how the technological, formal and spatial aspects of the metallic construction was derived by the application of Central Europe areas examples to the local reality, providing notions on designs, experimentations and originalities. Canopies, verandas, winter gardens and orangeries are architectural elements in iron and glass that represent an added value for the building, they improve the life quality of the people who live there. In particular, in the Liberty architecture these elements took shape thr…
Membrane Deformation and Its Effects on Flow and Mass Transfer in the Electromembrane Processes
2019
In the membrane processes, a trans-membrane pressure (TMP) may arise due to design features or operating conditions. In most applications, stacks for electrodialysis (ED) or reverse electrodialysis (RED) operate at low TMP (<
Performance improvement of a Savonius water rotor with novel blade shapes
2021
Abstract Savonius water rotor is a prominent drag based turbine able to extract energy available in flowing water with low velocity like river streams, tidal currents or other man made water canals. However, in view of its low performance, an enhanced design of the rotor blades is necessary to better its efficiency. Therefore, the present study aims to improve the efficiency of Savonius rotor by changing the blade design. Different blade shapes were investigated numerically using computational fluid dynamics (CFD). Using conventional design, the peak power coefficient was found to be 0.166 at tip-speed ratio of 0.78. However, the peak power coefficient reaches 0.184 using the optimal blade …