A panel having a first surface and a second surface each extending along an axis from a first end of the panel to a second end of the panel, each of the first surface and the second surface extending from a first edge of the panel to a second edge of the panel, wherein the first end, the second end, the first edge, and the second edge define a perimeter of the panel, and wherein the first surface defines a plurality of voids in communication with each other, the plurality of voids including:
- a first channel extending from the first end to the second end between two walls;
- and
- at least one notch extending from the first edge in a direction transverse to the first channel and terminating at the first channel;
- wherein each wall curves towards and away from the first surface to define at least one valley between adjacent peaks along the axis;
- and
- wherein the plurality of voids forms a flow path to direct a fluid from the first edge towards any one of the first end, the second end, or the second edge of the panel.