MFMP dogbone thermal test, earlier FEM simulation result
In support of the finding that the MFMP dogbone thermal power is not in agreement with the applied power, I post here the result of an early FEM simulation (Was I think posted on ECW before I moved to LF) that was in my opinion accurate enough to be indicative for the relationship between temperature and power.
Below is shown the FEM model of the dogbone created.
With that model the temperature versus power curve was calculated and combined in a single graph with the results of the MFMP dogbone thermal test.
The graph is shown below
From the graph it can be seen that the temperatures measured by the MFMP are much higher then those calculated by the FEM simulation program.
For the about 480 watt power of the Lugano dummy run the temperature is about 500 degree C while the MFMP measured about 700 degree C.
Note that the 500 degree C is not too far of from the about 450 degree C measured in the Lugano test.
The conclusion of the simulation is that the temperatures measured by the MFMP are not representative for the Lugano ECAT.
I will now starting work on upgrading the FEM model with the latest findings for view factor and convective heat correction and taking into account the power dissipated into the rods.
I also intend to increase the number of different sections the model is made up from in order to increase the accuracy of the simulations.
After doing so I expect that the simulated temperatures will be even closer to the ones in the Lugano report.