Abstract
The transient, two-dimensional heat transfer occurring in an electrothermal deicer pad was simulated using a number of finite-difference numerical methods. The alternating direction implicit method was found to be the most efficient procedure for this problem. A parametric study was performed to investigate the effects of gap width, nodal spacing, variable ice thickness, and variable outer heat-transfer coefficient on the solution. The results show that a two-dimensional simulation is required when the ratio of the heater length to the gap length is less than 2.5. To predict ice-interface temperature and melt times, the surface heat-transfer coefficient variation does not have to be considered except when the ice is very thin. In addition, for a heater wattage of 30 W/in., a nonuniform ice thickness can be modeled as a constant thickness if the ice is at least 0.125 in. thick at every location. A comparison of the numerical results with experimental data shows good agreement and serves to benchmark the code.
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