Streamline

Das monumentale Wandgemälde von Hans Erni für die Landesausstellung 1939 in Zürich widmet sich in einem kleinen Ausschnitt dem Automobil. Eines der beiden Fahrzeuge ist eine Hommage für den Stromlinienpionier Paul Jaray. Als Nachbarn in Luzern befreundeten und inspirierten sich der Künstler und der Ingenieur.

The diner, for many Americans, is a symbol of a period that has long gone, a time capsule, a place of memories and nostalgia. Nevertheless, the attributes of the diners and the dining culture that developed in them, along with their cuisine, had permeated so profoundly into the American landscape that they became obvious - generic pieces of everyday life across the country.

Similar to canning, diners preserve significant pieces of American culture. A micro-cosmos of social connections, political and economic ideologies, technological innovations, patterns of mechanization and standardization – defiantly as part of a particular moment in history but timeless as well.

The aim of this study is to analyze a nine-bladed axial fan, standard specifications are used to generate a framework of axial fan efficiency. Using currently available CFD programs, the research is carried out in an efficient manner. At the inlet, results were obtained using typical boundary conditions, with fluid conditions at the outlet. The results showed a higher pressure of 381.62 Pa and a maximum velocity of 37.5 m/s at the outlet for these conditions. These results can also be used to compare the performance of a nine-blade axial fan with a nineand twelve-blade axial fan.

Natural convection in enclosed cavities is widely studied because of its importance in many engineering applications. The most commonly used enclosures in the industries are rectangular, cylindrical, trapezoidal, triangular etc. In recent years, natural convection in triangular shaped enclosures have received a considerable attention. The reason for considering this geometry is, it has application in various fields such as building and thermal insulation systems. In the present study natural convection inside a triangular enclosure is analyzed. The analysis is conducted as 3 different cases. For the first case the bottom wall is heated and other two sides are kept at ambient temperature. For the second case, left wall is heated and other two sides are kept at ambient temperature and for the final case right wall is heated and other two sides are kept at ambient temperature. Simulations are carried out for varying Rayleigh number. Heat transfer rate from the hot surface is obtained numerically. The fluid flow characteristics and heat transfer characteristics are analyzed using computational fluid dynamic software ANSYS FLUENT 14.0.