Published Paper Details:

Numerical analysis of natural convection in open ended ended two dimensional axisymmetric vertical tube has been carried out for a wide temperature range to find out the relation between non-dimensionalized number. Walls are maintained at constant wall temperature due to which convective flows were analyzed by varying the wall temperature and aspect ratio of the tube. The simulation is carried for turbulence model of natural convection. It was found that there is no single non dimensional number on which the flow can dependent. Numerical analysis of two-dimensional natural convection in open ended vertical tube has been carried out for a wide range of heat generation rate to find out the appropriate non-dimensional numbers governing the process. Buoyancy induced flows in a tube with adiabatic wall boundary condition and uniform volumetric heat generation rate in fluids were analyzed by varying heat generation rate and the geometrical aspect ratio of the tubes with and without considering surface radiation. Curve fits have been provided for non-dimensionalized mass flow rate versus other relevant non-dimensional numbers based on heat generated and geometry of the tube. Non-dimensional correlation has been found out for natural convection flow in an open adiabatic tube with internal heat generation and neglecting surface radiation. One more non-dimensional correlation has been found out for natural convection flow in an open adiabatic tube with internal heat generation and considering surface radiation.