Fountains injected into stratified fluids are widely found in environmental and industrial settings. The onset of asymmetry and entrainment that occurs in transitional fountains is the key to understanding turbulence generation and entrainment mechanisms in fountains. In addition to the Reynolds number (Re) and the Froude number (F r), the

No abstract

The effect of angle of rotation on laminar natural convection inside the square cavity have been observed in this research. It was assumed that left and right walls heated isothermally, whereas other two walls act as adiabatic. This problem was solved by assuming 2-D and by Direct Numerical Simulation (DNS) method using ANSYS Fluent 16.0. A series of DNS simulation were carried out for different inclination angle (𝜃 = 0°~90°) of the cavity at Ra = 103 & 104. It was observed that at average Nusselt number increase up to some value of angle of inclination after that it decrease though this variation is not significant.

No abstract

This paper emphasizes on the effects of certain baffle orientation and baffle cut for a simple shell and tube heat exchanger. As heat being transferred between separate medium might contribute some heat loss to the surroundings resulting in an ineffective heat transfer, this calls for the remedy to minimize the loss and improve heat transfer characteristics. This is where baffle orientation and baffle cut plays its role and improves the heat transfer phenomena. The analysis is performed using a commercial CFD software package FLUENT. Among different turbulence models k-ɛ (2-eqn) is considered for this study. A number of simulations is conducted by varying the Reynolds number, baffle cut, and orientation of baffles. After examining the result it is noticed that pressure drop and heat transfer coefficient both decreases as the baffle cut is increased for a particular Reynolds number, but as the Reynolds number is increased keeping the baffle cut constant, pressure drop and heat transfer coefficient both increases. Last but not the least the above findings can be used for further study and there is also scopes for some improvement of the current study.