tdynreference manual
The control volume window allows an easy definition and creation of the control volume in most cases. Select the dimensions of the volume, insert the upstream (fore point) and downstream (aft point) extreme points of the body (body_wet layer) and press OK.
Note that the created volume will be oriented in the main Cartesian axes and therefore the body must be oriented accordingly.
Following are commands available in the Create control volume window:
X factor defines the x-length of the control volume. This dimension is defined by the upstream (fore) and downstream (aft) sides. x-length = (1.0+fore+aft) · length | |
Y factor defines the y-length of the control volume. | |
Z factor defines the z-length of the control volume. | |
Length (body length) is calculated from the point data described below. | |
Reference fore point: Upstream reference point (extreme in general) of the body_wet layer. If possible, this must be in the symmetry plane y = yo and in the floating line. | |
Reference aft point: Downstream reference point (extreme in general) of the body_wet layer. If possible, this must be in the symmetry plane y = yo and in the floating line. | |
Press OK to create the control volume. | |
Figure 12 Create control volume window commands |
Create control volume window can be accessed through the menu option Utilities>Tdyn Wizard>Control Volume.
Note that in order to operate this tool; the geometry must be split in the standard layers, as explained in the previous step.
Observe that it is also possible to generate the control volume manually, split it in the standard layers, and continue with the next step.
The resulting geometry will be split in the following layers:
a. Body_wet: surface (-s) of the body within the fluid
b. Body_dry: surface (-s) and lines of the body out of the fluid (if any)
c. Free_surf: free surface (if any) of the problem
d. Symm_oy: symmetry plane y = yo
e. Volume: control volume
f. Inlet_ox: inlet surface of the problem x=xo
g. Outlet_ox: outlet surface of the problem x=xo
h. Lateral_oy: lateral surface of the problem y=yo
i. Lateral_oz: lateral surface of the problem z=zo
Figure 13 Resulting layer definition of the control volume |
Once the volume has been created, press Next to continue with data definition.