Hot wire anemometer calibration for measurements of small gas velocities

Andrews, GE; Bradley, D.; Hundy, G.F.

doi:10.1016/0017-9310(72)90053-1

Cited by 88 publications

(67 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar methods has been used before in a number of investigations (Almquist & Legath 1965;Andrews et al 1972;Koppius & Trines 1976;Lee & Budwig 1991;Manca et al 1988). A pressure regulator was used to control the supply from the compressed air line (~ 100 psig).…”

Section: Constant Temperature Anemometry (Cta) For Measuring Velocitymentioning

confidence: 98%

“…However such correlations are difficult to apply and are not used in most calibrations (Andrews et al 1972). Earlier findings in air (Collis & William 1959) reveals that the major effect of the end cooling in the apparent value of Nu, was to alter the constants A and B in Equation 5.4 but not the power of Re.…”

Section: Heat Transfer Correlations From Heated Wires At Low Reynoldsmentioning

confidence: 99%

“…Re Gr > . Table 5.1 provides an assortment of correlations available over the entire regime (free to forced via mixed convection), An excellent review work on heat transfer correlations was provided by Andrews et al (1972). A review of the heat transfer correlations used in hot-wire anemometry was provided in Table 5.2.…”

Section: Heat Transfer Correlations From Heated Wires At Low Reynoldsmentioning

confidence: 99%

“…The use of small diameter wires (dB wire B ≤ 5 µm) in hot-wire anemometry means that non-continuum effects cannot be ignored even at a pressure of one atmosphere (Andrews et al 1972). There is a discontinuity in the temperature distribution at the wall when heat transfer (by conduction) takes place between a rarefied gas and the heated bounding wall (the wire in this case).…”

Section: Effect Of Temperature Jump On the Heat Transfer Coefficientmentioning

confidence: 99%

“…The accommodation coefficient is defined as the fractional extent to which molecules which falls on the surface, and are reflected or re-emitted, have their mean energy adjusted (or "accommodated") towards the values which it would obtain if the returning molecules are to issue as a stream from a mass of gas at the wall temperature (Andrews et al 1972). For most gas-surface combinations, ξ is of the same order as λ.…”

Section: Effect Of Temperature Jump On the Heat Transfer Coefficientmentioning

confidence: 99%

See 4 more Smart Citations

Statistically steady measurements of Rayleigh-Taylor mixing in a gas channel

Banerjee

Andrews

2006

Physics of Fluids

View full text Add to dashboard Cite

A novel gas channel experiment was constructed to study the development of high Atwood number Rayleigh-Taylor mixing. Two gas streams, one containing air and the other containing helium-air mixture, flow parallel to each other separated by a thin splitter plate. The streams meet at the end of a splitter plate leading to the formation of an unstable interface and of buoyancy driven mixing. This buoyancy driven mixing experiment allows for long data collection times, short transients and was statistically steady. The facility was designed to be capable of large Atwood number studies of AB t B ~ 0.75. We describe work to measure the self similar evolution of mixing at density differences corresponding to 0.035 < AB t B < 0.25. Diagnostics include a constant temperature hot-wire anemometer, and high resolution digital image analysis. The hot-wire probe gives velocity, density and velocity-density statistics of the mixing layer. Two different multi-position single-wire techniques were used to measure the velocity fluctuations in three mutually perpendicular directions. Analysis of the measured data was used to explain the mixing as it develops to a self-similar regime in this flow. These measurements are to our iv knowledge, the first use of hot-wire anemometry in the Rayleigh-Taylor community.Since the measurement involved extensive calibration of the probes in a binary gas mixture of air and helium, a new convective heat transfer correlation was formulated to account for variable-density low Reynolds number flows past a heated cylinder. In addition to the hot-wire measurements, a digital image analysis procedure was used to characterize various properties of the flow and also to validate the hot-wire measurements. A test of statistical convergence was performed and the study revealed that the statistical convergence was a direct consequence of the number of different large three-dimensional structures that were averaged over the duration of the run.

show abstract

Section: Constant Temperature Anemometry (Cta) For Measuring Velocitymentioning

confidence: 98%

Section: Heat Transfer Correlations From Heated Wires At Low Reynoldsmentioning

confidence: 99%

Section: Heat Transfer Correlations From Heated Wires At Low Reynoldsmentioning

confidence: 99%

Section: Effect Of Temperature Jump On the Heat Transfer Coefficientmentioning

confidence: 99%

Section: Effect Of Temperature Jump On the Heat Transfer Coefficientmentioning

confidence: 99%

See 3 more Smart Citations