Measurement of Localized Flow Velocities in Gases With a Laser Doppler Flowmeter

Foreman, J. W.; George, E. W.; Lewis, R. D.

doi:10.1063/1.1754319

Cited by 130 publications

(25 citation statements)

References 2 publications

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“…After passing through a contraction, the air encounters a honeycomb grid, which removes any large-scale turbulent structures from the ow. Finally, the air travels downstream to the 1:52 m × 1:21 m × 7:30 m test section where velocity measurements are taken with a two-dimensional 514-nm Argon-Ion laser phase Doppler anemometer (PDA) (Dantec Measurement Technology, Inc., Copenhagen, Denmark), which is described in detail in many publications including [44][45][46][47].…”

Section: Wind Tunnelmentioning

confidence: 99%

Verification testing in computational fluid dynamics: an example using Reynolds‐averaged Navier–Stokes methods for two‐dimensional flow in the near wake of a circular cylinder

Richmond-Bryant¹

2003

Numerical Methods in Fluids

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SUMMARYVeriÿcation testing was performed for various Reynolds-averaged Navier-Stokes methods for uniform ow past a circular cylinder at Re = 5232. The standard and renormalized group (RNG) versions of the k-method were examined, along with the Boussinesq, Speziale and Launder constitutive relationships. Wind tunnel experiments for ow past a circular cylinder were also performed to obtain a comparative data set. Preliminary studies demonstrate poor convergence for the Speziale relationship.Veriÿcation testing with the standard and RNG k-models suggests that the simulations exhibit global monotonic convergence for the Boussinesq models. However, the global order of accuracy of the methods was much lower than the expected order of accuracy of 2. For this reason, pointwise convergence ratios and orders of accuracy were computed to show that not all sampling locations had converged (standard k-model: 19% failed to converge; RNG k-model: 14% failed to converge). When the non-convergent points were removed from consideration, the average orders of accuracy are closer to the expected value (standard k-model: 1.41; RNG k-model: 1.27). Poor iterative and global grid convergence was found for the RNG k-=Launder model. The standard and RNG k-models with the Boussinesq relationship were compared with experimental data and yielded results signiÿcantly di erent from the experiments.

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Section: Wind Tunnelmentioning

confidence: 99%

Verification testing in computational fluid dynamics: an example using Reynolds‐averaged Navier–Stokes methods for two‐dimensional flow in the near wake of a circular cylinder

Richmond-Bryant¹

2003

Numerical Methods in Fluids

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“…Some of the most common laser-based systems are the laser Doppler velocimeter (LDV) [1] and the laser timeof-flight velocimeter (LTV) [2]. Although commercial laser-based flow sensor systems have been available for more than three decades, a wide spread use of such systems for industrial applications and in industrial environments has been very limited.…”

Section: Introductionmentioning

confidence: 99%

Holographic optical element for laser time-of-flight flow sensor

Dam-Hansen

Kitchen

2006

Optics and Lasers in Engineering

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“…Four years later, applications to the measurement of velocities in liquids using a new technique, namely laser Doppler velocimetry (LDV) by Yeh and Cummins [15], followed by other measurements in liquids and gases by Foreman et al [16][17][18], were introduced. This was the beginning of a stream of research in quasi-elastic light scattering (quantum mechanical phenomena excluded) that we are now briefly going to summarize.…”

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confidence: 99%