6. D modeling

6.1. Characteristics of modeling

We use non-linear thermal 3D modeling with hyper-reduction of the model. This modeling tests the accuracy of the empirical modes obtained in modeling A on the reduced domain created in modeling B.

We therefore use the bases produced in modeling A and the reduced domain created in modeling B. The reconstruction operator REST_REDUIT_COMPLET is also tested by gappy- POD.

6.2. Characteristics of the mesh

The mesh contains 27 elements of type HEXA8.

6.3. Tested sizes and results

We test the value of the temperatures obtained with a hyper-reduced model compared to those obtained in the complete model (U modeling):

Node B does not belong to the reduced domain RID. We can therefore not access its value at the end. hyper-reduced thermal calculation. We use operator REST_REDUIT_COMPLET:

And for flows:

6.4. notes

We see that the base produced in modeling A on the reduced domain of modeling B makes it possible to obtain very good results (error less than 0.01%) compared to the complete calculation. But they are necessarily slightly worse than in the simply reduced case (modeling C).

In addition, the reconstruction operator REST_REDUIT_COMPLET also gives a good solution to 0.3% close on the temperature rated outside of RID.

The values are less good for flows, due to their very low absolute value.