tut3d_06

TUTORIAL 6: flow around a periodically moving cylinder

Goals of this Unit:

user-defined functions, see especially Equations

The Fluid Mechanical Problem Once again we keep our setting as the previous example and only change the movement of the cylinder. Here should be a picture

Figure 16: Fluid Flow with periodically moving cylinder

Instead of constant movement, we now want to move it periodically according to our own equation:

MOVE($MOVE_circle$) = ( %MOVE_position%, 0, [0.3*sin(15.0*Y%ind_time%+0.0)], 0)

Here, as you see, we use the index %ind_time% which stores the current simulation time. Same goal can be achieved by defining the equation and flagging it by an 'equation name', which can then be referred here in the right hand side of MOVE statement. See Equations, for example. All the other settings are similar to tut3d_05 and tut3d_04a . temperature as material coloring Again, we use the temperature as colorizing functionality of the material, in order to visualize the mixing effect of the periodically moved cylinder. For that purpose, we give an extremely small heat conductivity as well as isolating boundary conditions for the temperature, similar to tut3d_02. Here should be a picture

Figure 16b: temperature colorizing the material and thus visualizing the mixing effect of the moving cylinder

Note: In order to reproduce Figures 16 and 16b, load the state files tut06_figure16.pvsm and tut06_figure16b.pvsm in ParaView and choose 'Search files under specified directory'. Then, select the correct data directory (MESHFREE results folder).