Abstract
Natural convection heat transfer from a heater block in a rectangular vessel was studied experimentally and numerically A rubber heater heated up the heater block electrically. The vessel walls except bottom wall were maintained at an ambient temperature and the bottom wall was insulated. Numerical calculations took account of a combination of the natural convection and heat conduction in the heater block and vessel wall. Isotherms, streamlines, and temperature distributions at the measured lines were presented.
