Even though Paraview provides plenty of analysis tools, the aerodynamicists often require some specific tools: they are provided by Epsilon.
• Distribution of integrated aerodynamic parameters (lift, drag, exergy, anergy) along some axis (chord, span).
• Mapping 3D data into a plane (integration method).
• Poisson solver.
Distribution of integrated aerodynamic parameters
The most typical aerodynamic analysis is to plot the distribution of a certain parameter along the chord or span of a body.
Since lift, drag and exergy are integral quantities, this kind of plot requires first performing a plane integral at several stations and then to plot the integrated values along the desired axis. This is achieved by the automatic integration tool provided by Epsilon.
In order to do that, a survey plane is created and the desired positions of the plane are defined:
Then, the tool performs an automatic integration at each position and hence the output can be plotted along the sweeping direction:
The integrated data can be plotted superimposed to the 3D geometry as shown in the previous images or, more classically, in a 2D plot inside ParaView (Data can also be exported to be plotted in your favorite plot package).
Mapping 3D data into a plane
The same integration tool can be used in a different way for the case of 3D data. In those cases a line can be used instead of a plane for the integral. This allows the integration of the 3D volume data into a plane:
Another tool provided by Epsilon is a Poisson equation solver. This tool is required by the Maskell method in order to calculate the induced drag. This tool solves the Poisson equation starting from the axial vorticity field and gives the related stream function: