Fluid dynamics

Using reduced order model for coupled solid/fluid case

1) Solid heated bar in a cavity

We consider a coupled solid/fluid case. A flow at given velocity and temperature profile is injected in a cavity. A solid heated bar is fixed in the middle of this cavity. The flow temperature is changing with time. The geometry and mesh are given in next figure.

The data of a simulation corresponding to the “tri” profile (in red in the figure below) is used by dynaROM™ to generate a dynamic reduced order model. Then, the model can predict the flow evolution for three other temperatures profiles: square, sqtri, sinus, defined in the following figure.

The results of these simulations are compared to the reference ones in the following videos. Only the temperature part of the field is presented.

  • “Sinus” profile

 

  • Sqtri profile

 

  • Square profile

 

2) Fluid/Solid Coupled Heat Transfer 

The geometry of the test case is given below.

A first case was used for learning the dynamical reduced order model :

 

A second case was used for prediction :

 

3) Coronary artery test case  

The dynaROM™ product allows one to reproduce simulations of arterial systems.

The average velocity is imposed at the inlet of the coronary. The velocity profile in red was used to build the dynaROM™ model. The velocity profile in blue was used for validation.

One can see a good agreement between dynaROM™ predictions and the results obtained by Fluent computations.