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For the second run, the pressure and temperature dependant contact
resistance %table% setup was activated. The model voltage drop
prediction in those conditions is 285 mV (see figure 4). The two
runs predict about the same voltage drop indicating that the 2
micro-ohm m² is very close to the average contact resistance value

for the second run, yet we can clearly see in figure 5 that is
comparing the current density distribution in the cast iron that a
significant redistribution of the current path has occurred.

Figure 4:

Model predicted voltage drop for the pressure and

temperature dependant contact resistance setup (V)

Constant contact resistance model results

Pressure and temperature dependant model results

Figure 5:

Comparison of the current density distribution in the

cast iron between the constant contact resistance
model setup and the pressure and temperature
dependant model setup (A/m²)

Second demonstration model

For the second demonstration model presented, the 16 flutes option
was used (see cast iron mesh in figure 6). When using "classic" TE
models with constant contact resistance setup, adding more flutes is
always better because it is increasing the cast iron/anode carbon
interface contact surface hence decreasing the predicted voltage
drop regardless of the flutes geometry.

Figure 6:

Quarter stub hole thermo-electro-mechanical model:

cast iron mesh 16 flutes design