X-direction cosine of the outward normal to the exposed transition section area, pointing into the fluid, in the initial configuration.
Y-direction cosine of the outward normal to the exposed transition section area, pointing into the fluid, in the initial configuration.
Z-direction cosine of the outward normal to the exposed transition section area, pointing into the fluid, in the initial configuration.
Repeat this pair of data lines as often as necessary to define concentrated fluid added mass at various nodes or node sets.