Effect of transition in cross-sectional shape on the development of the velocity and pressure distribution of turbulent flow in pipes
This is a 1939 NASA technical report, translated from German, on how changing a pipe's cross-section shape affects turbulent flow velocity and pressure, written for engineers in fluid mechanics. The pictures are dense engineering plots: isotach contour grids in numbered cross-sections, a 3D surface of velocity across x and y directions, and a sectional drawing of transition shapes from rectangular to circular. A designer might borrow the layered contour-line and grid-plot aesthetic for technical infographics or data-visualization backgrounds.
