Witte, Larry C.2022-10-062022-10-06197013864612https://hdl.handle.net/10657/12221A theoretical treatment is presented for the heat transfer rates over spheres and cylinders in forced convection film boiling when the liquid bulk is subcooled to any degree. With the help of suitable assumptions, solutions for temperature profiles in liquid and vapour boundary layers are obtained which are then used to formulate a total energy balance on the sphere surface. The resulting equation is solved numerically to determine vapour film thickness at every point on the sphere body. Dimensionless Nusselt numbers are then computed for any given system parameters k[subscript 1] and k[subscript 2] (dimensionless), which can be looked upon as a general solution to the problem. It is confirmed that subcooling of the liquid bulk raises the heat transfer substantially. A number of comparisons with experiment are made which in general show a reasonably good match between the theory and the experimental trend. Theoretical fluxes obtained are about one half the experimental values.application/pdfenThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.Thesisreformatted digital