Showing papers by "Richard J Goldstein published in 1983"
01 Jan 1983
TL;DR: In this article, the physical laws of fluid mechanics and their application to measurement techniques are discussed, as well as the application of these laws to flow visualization and flow visualization by direct injection.
Abstract: Contributors Preface Preface to the First Edition 1.What Do We Measure and Why? 2.Physical Laws of Fluid Mechanics and Their Application to Measurement Techniques 3.Thermal Anemometers 4.Laser Velocimetry 5.Volume Flow Measurements 6.Flow Visualization by Direct Injection 7.Optical Systems for Flow Measurement:Shadowgraph Schlieren, and Interferometric Techniques 8.Fluid Mechanics Measurements in Non-Newtonian 9.Measurement of Wall Shear Stress 10.Acquiring and Processing Turbulent Flow Data Index
628 citations
TL;DR: In this paper, the authors measured the local heat transfer from a flat plate to arrays of impinging circular air jets and averaged numerically to obtain spanwise and streamwise-spanwise averaged heat transfer coefficients.
Abstract: Measurements are made of the local heat transfer from a flat plate to arrays of impinging circular air jets. Fluid from the spent jets is constrained to flow out of the system in one direction. Two different jet-to-jet spacings, 4 and 8 jet diameters, are employed. The parameters that are varied include jet-orifice-plate to impingement-surface spacing and jet Reynolds number. Local heat transfer coefficients vary periodically both in the flow direction and across the span with high values occurring in stagnation regions. Stagnation regions of individual jets as determined by local heat transfer coefficients move further in the downstream direction as the amount of crossflow due to upstream jet air increases. Local heat transfer coefficients are averaged numerically to obtain spanwise and streamwise-spanwise averaged heat transfer coefficients.
83 citations
TL;DR: In this article, the effect of insulated vertical and horizontal extensions to the plate was examined, and it was shown that vertical walls block the fluid flow directly, and thus greatly lower the transfer rate with either outward or inward buoyancy.
Abstract: Laminar natural convection from a horizontal plate is studied by a finite-difference analysis and by experiments for Rayleigh numbers from 10 to 104. The plate with uniform surface temperature or concentration on one side and insulated on the other is situated in an ‘infinite’ fluid medium. The buoyancy near the surface is directed either outward or inward normal to the active surface – equivalent to a heated plate facing upward or downward. The effect of insulated vertical and horizontal extensions to the plate are also examined.Finite-difference solutions are obtained for a heated strip in a two-dimensional domain for a Prandtl number of 0·7. Mass-transfer experiments are performed with square naphthalene plates in air. Both numerical and experimental results justify a 1/5-power law in the present range of Rayleigh number – i.e. Nusselt number or Sherwood number proportional to the Rayleigh number raised to the 1/5 power. The horizontal extensions cause a limited reduction in the transfer rate for the plate generating ‘outward buoyancy’, and a larger reduction with ‘inward buoyancy’. The vertical walls block the fluid flow directly, and thus greatly lower the transfer rate with either outward or inward buoyancy.
83 citations
20 citations