Heat Transfer. Please help with the task stated below An electric heater is used

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Heat Transfer. Please help with the task stated below

An electric heater is used to maintain a water bath at 80 degree C, as shown in Figure 1(a). As part of reliability testing, it is necessary to know what happens to the heater and surround if the water level was to drop. As the engineer assigned this task you are required to investigate this problem using numerical heat transfer methods. In particular, you must find the temperature distribution within the heater surround under three conditions: Fully Submerged 50% Submerged Completely exposed to air Using these results you must comment on the observed operating requirements for the heater. Task By considering the 2-dimensional cross-section through the heater surround, construct a nodal temperature grid, and derive the finite difference equations for the internal and boundary nodes.

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