Natural convection in an annulus with a discrete heat source on the inner cylinder is studied numerically. The outer cylinder is isothermally cooled at a fixed low temperature, and the top wall, the bottom wall and unheated portions of the inner cylinder are thermally insulated. For low applied heat flux through the heater, as measured non-dimensionally by a Grashof number, Gr , the flow in the...

An electromagnetic analysis is presented for experiments with strong permanent disc magnets. The analysis is based on the well known experiment that demonstrates the effect of circulating eddy currents by dropping a strong magnet through a vertically placed metal cylinder and observing how the magnet is slowly falling through the cylinder with a constant velocity. This experiment is quite spect...

Tissue engineering is an emerging technology to replace tissues and organs damaged due to trauma of disease with fully functional living tissue equivalents. Tissue development is facilitated by bioreactors, devices engineered to deliver appropriate spatial and temporal nutrient transport and mechanical loading in a welldefined and controlled environment. Bioreactors that provide well-defined an...