1. The analytical prediction of superposed free and forced viscous convection in a vertical pipe;Boelter,1942
2. Die Ueberlagerung von erzwungener und natuerlicher Konvektion bei niedrigen Durchsaetzen in einem lotrechten Rohr;Brown;VDI Forschungsheft,1960
3. Combined forced and free-convection in a vertical tube;Hallman,1958
4. The effect of natural convection on transition to disturbed flow in a vertical pipe;Scheele,1962
5. A method of correlating forced convection heat transfer data and a comparison with fluid friction;Colburn;Trans. A.I.Ch.E.,1933