Abstract
An experimental investigation was made of the effects of transverse vibratory motion on the heat transfer coefficient on a heated, vertical flat plate. A study was made of the effects of both amplitude and frequency. It was found that the heat transfer coefficient was a function of the vibrational Reynolds modulus where the conventional velocity term was replaced by the product of total excursion of the plate and the frequency of vibratory motion. The ratio of the Nusselt modulus during vibration to that at rest dropped slightly for relatively low values of the vibrational Reynolds modulus. The ratio reached a minimum of 0.98 and rapidly increased to unity and beyond. The scope of this investigation was limited to that region where the Nusselt ratio was less than unity. Previous theoretical investigations had predicted this drop in Nusselt ratio on the basis of potential secondary flow which would cause streaming that would impede the free convective flow along the plate surface. This investigation substantiates the proposed theory and shows excellent agreement with some recent experimental results. Some of the causes of instability in transitional flow are also discussed.
Helmers, Donald Jacob (1965). The effects of vibratory motion on heat transfer by free convection from a heated flat plate. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -174803.