Showing papers by "Thomas F. Irvine published in 1992"
TL;DR: In this article, the Schmidt and Lewis numbers were used to measure the diffusion coefficient of naphthalene into air over the temperature range 15°C to 55°C. The repeatability of the data is 2% and the estimated possible systematic error is ±3%.
68 citations
01 Apr 1992
TL;DR: In this paper, the authors examined the pressure drop and heat transfer characteristics associated with flows of modified power law fluids through concentric annular ducts, where the flows considered are steady, fully developed and laminar with constant properties, except for viscosity.
Abstract: The following numerical analysis examines the pressure drop and heat transfer characteristics associated with flows of modified power law fluids through concentric annular ducts. The flows considered are steady, fully developed and laminar with constant properties, except for viscosity. The boundary conditions for the heat transfer problem are constant heat flux at the inner tube, and an adiabatic outer tube. Results are presented for the friction factor-Reynolds number product and for the Nusselt number as a function of a dimensionless shear rate parameter. These are expressed as correlation equations which give a convenient description of the results throughout the complete domain of the analysis: from low shear rates where the viscosity is Newtonian, to the higher shear rates where the behavior is purely power law, and at the intermediate shear rates where the viscosity is transitional.
42 citations
01 Apr 1992
TL;DR: In this paper, the Berenson film-boiling model was used for stable film boiling of water over a horizontal, flat stainless steel plate from the minimum film boiling point temperature, T{sub surface} {approximately}500K, to T{ sub surface} [approximately}950K.
Abstract: Heat transfer measurements were made for stable film boiling of water over a horizontal, flat stainless steel plate from the minimum film boiling point temperature, T{sub SURFACE} {approximately}500K, to T{sub SURFACE} {approximately}950K. The pressure at the plate was approximately 1 atmosphere and the temperature of the water pool was maintained at saturation. The data were compared to the Berenson film-boiling model, which was developed for minimum film-boiling-point conditions. The model accurately represented the data near the minimum film-boiling point and at the highest temperatures measured, as long it was corrected for the heat transferred by radiation. On the average, the experimental data lay within {plus_minus}7% of the model. Measurements of heat transfer were made without film boiling for nitrogen jetting into an overlying pool of water from nine 1-mm- diameter holes, drilled in the heat transfer plate. The heat flux was maintained constant at approximately 26.4 kW/m{sup 2}. For water-pool heights of less than 6cm the heat transfer coefficient deceased linearly with a decrease in heights. Above 6cm the heat transfer coefficient was unaffected. For the entire range of gas velocities measured [0 to 8.5 cm/s], the magnitude of the magnitude of the heat transfer coefficient only changed by approximatelymore » 20%. The heat transfer data bound the Konsetov model for turbulent pool heat transfer which was developed for vertical heat transfer surfaces. This agreement suggests that surface orientation may not be important when the gas jets do not locally affect the surface heat transfer. Finally, a database was developed for heat transfer from the plate with both film boiling and gas jetting occurring simultaneously, in a pool of water maintained at its saturation temperature. The effect of passing nitrogen through established film boiling is to increase the heat transfer from that surface. 60 refs.« less
1 citations