Problem data

Once the boundary conditions have been assigned, we have to specify the other parameters of the problem. These have to be entered in the Problem and Solver Data window that can be opened by selecting Data > Problem Data in the menu.

For every parameter in the Problem and Solver Data windows, the respective units have to be verified, and changed if necessary (in our example, all the values are given in default units).

Remark:

Note that after entering or changing parameters in the Problem and Solver Data windows the Accept Data button has to be pressed.

Through Tdyn Problem and Solver Data window it is possible to define the type of problem to be analysed. This is done in the PROBLEM page.  The final values of this page are shown in Figure 8.

Figure 8Problem and Solver Data  window. PROBLEM page

In the ANALYSIS page some global information neccessary for the analysis is entered as shown in Figure 9.

Figure 9 Problem and Solver Data window. ANALYSIS  page

Through the Tdyn Problem and Solver Data window it is also possible to apply the symmetry plane option of Tdyn. This condition imposes a symmetry plane in the corresponding coordinates. It does not need to be assigned to the entities (surfaces) of the control volume as the other boundary conditions, and it can be set directly in the OTHER page of the Tdyn Problem and Solver Data window.

Figure 10Problem and Solver Data  window. OTHER options

In our case, the Zplane Symmetry in Fluid indicates that the normal velocity component to that plane is null (see Figure 10), and is thus adequate for the two lateral surfaces (contained in the XY-plane, see Figure 11):

Figure 11 Symmetry planes

 

Finally, Figure 12 gives a brief summary of the boundary conditions that have been applied to the control domain.

Condition/Property

Entity

Fix Velocity

Surface 1

Fluid Body

Surfaces 2, 3, 4

Material Fluid

Volume V

Figure 12 Overview of the applied conditions