ON THE DESIGN OF HEAT-TRANSFER PROBES

Saxena and coworkers have reported heat-transfer coefficient values fo r magnetofluidized beds using electrically heated heat-transfer probes . Here, a two-dimensional heat-transfer model is employed to investiga te the influence of significant design features on measured parameters . Numerical calculations reveal that the thermal conductivity of the p robe material has an insignificant contribution but the material of en d caps and relative sizes and locations of the probe and heater apprec iably influence the heat-transfer rates through end-conduction. (C) 19 97 Elsevier Science Ltd.