Three-dimensional diagnostics in air and water by molecular tagging and molecular scattering

1996 ◽  
Author(s):  
R. Miles ◽  
W. Lempert
Keyword(s):  
Three Dimensional ◽  
Molecular Scattering ◽  
Molecular Tagging ◽  
Dimensional Diagnostics

Molecular Tagging Fluorescence Velocimetry (MTFV) to Measure Meso- to Micro-Scale Thermal Flow Fields

2000 ◽  
Author(s):  
J. S. Park ◽  
K. D. Kihm ◽  
D. M. Pratt
Keyword(s):  
Capillary Flow ◽  
Three Dimensional ◽  
Surface Flow ◽  
Three Dimensional Flow ◽  
Molecular Tagging ◽  
Dimensional Flow ◽  
Thermally Driven ◽  
Thermocapillary Stress ◽  
Flow Effects ◽  
Capillary Pore

Abstract The development of a molecular tagging fluorescence velocimetry (MTFV) system is discussed and measurement results are presented for a meso-scale flow field of thermally driven capillary pore of 5-mm inner diameter that is tilted 5° from the horizon. The developed technique uses caged Dextran conjugates of caged fluorescene dyes of less than 10 nm in size for tracers. The frequency-tripled UV band (λ = 355 nm) of a pulsed Nd:YAG laser uncages the molecules by photo-cleaving that is decomposition of a caging chemical group and a fluorescence chemical group. Then a CW blue Argon-ion laser (λ = 488 nm) pumps the fluorescence of only those uncaged molecules, whose emmission band is centered at λ = 518 nm, and a sequential recording of the fluorescence images are digitally recorded and analyzed for Lagrangian velocity field mapping. The use of the technique allows detailed measurements of the thermally driven three-dimensional flow inside a heated capillary pore. The measurement shows that the meniscus surface flow is mainly driven by the thermocapillary stress field, occurring due to the surface temperature gradient, while the bulk flow inside the pore is driven largely by the natural convection buoyancy. The whole capillary flow is made by a combination of these two different flow effects. As to the heater position, above or below the interface, the three dimensional flow patterns are measured totally in the opposite way.

THREE-DIMENSIONAL DIAGNOSTICS OF TRANSPORT PHENOMENA

1983 ◽  
Vol 404 (1 Fourth Intern) ◽  
pp. 347-347
Author(s):  
R. Goulard ◽  
P. J. Emmerman ◽  
R. J. Santoro ◽  
H. G. Semerjian
Keyword(s):  
Transport Phenomena ◽  
Three Dimensional ◽  
Dimensional Diagnostics

Periodic orbit assignment for spectra of highly excited molecular systems

1990 ◽  
Vol 332 (1625) ◽  
pp. 343-359 ◽  
Keyword(s):  
Periodic Orbits ◽  
Bound States ◽  
Hydrogen Exchange ◽  
Molecular Spectroscopy ◽  
Three Dimensional ◽  
High Energy ◽  
Coarse Grained ◽  
Molecular Spectra ◽  
Exchange Reactions ◽  
Molecular Scattering

Recent experiments in high-energy molecular spectroscopy have shown that coarse grained molecular spectra are often very simple, characterized by a few frequencies or correlation times. Experiments in molecular scattering such as the hydrogen exchange reactions have demonstrated the existence of short-lived resonances. I show that these seemingly differing experiments may be interpreted and assigned in terms of the normal modes of periodic orbits, which are determined by a linear stability analysis. Specific examples include three-dimensional resonances of the hydrogen exchange reaction as well as three-dimensional high-energy bound states of the Hg molecular ion. A new semiclassical quantization method based on unstable periodic orbits is presented and used to explain the observed scarring of high-energy quantum states.

Quantitative, three-dimensional diagnostics of multiphase drop fragmentation via digital in-line holography

2013 ◽  
Vol 38 (11) ◽  
pp. 1893 ◽  
Author(s):  
Jian Gao ◽  
Daniel R. Guildenbecher ◽  
Phillip L. Reu ◽  
Varun Kulkarni ◽  
Paul E. Sojka ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dimensional Diagnostics

Three-dimensional diagnostics and measurements of inertial confinement fusion plasmas

2021 ◽  
Vol 92 (5) ◽  
pp. 053526
Author(s):  
D. J. Schlossberg ◽  
R. M. Bionta ◽  
D. T. Casey ◽  
M. J. Eckart ◽  
D. N. Fittinghoff ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Three Dimensional ◽  
Inertial Confinement ◽  
Fusion Plasmas ◽  
Confinement Fusion ◽  
Dimensional Diagnostics

HIGH SPEED THREE-DIMENSIONAL DIAGNOSTICS IN COMBUSTION

1982 ◽  
pp. 162-171
Author(s):  
R. Goulard ◽  
P.J. Emmerman ◽  
R.J. Santoro ◽  
H.G. Semerjian
Keyword(s):  
High Speed ◽  
Three Dimensional ◽  
Dimensional Diagnostics

scholarly journals The spectral signature of cloud spatial structure in shortwave irradiance

2016 ◽  
Vol 16 (21) ◽  
pp. 13791-13806 ◽  
Author(s):  
Shi Song ◽  
K. Sebastian Schmidt ◽  
Peter Pilewskie ◽  
Michael D. King ◽  
Andrew K. Heidinger ◽  
...  
Keyword(s):  
Spatial Structure ◽  
Three Dimensional ◽  
Large Degree ◽  
Spatial Inhomogeneity ◽  
Spectral Signature ◽  
Molecular Scattering ◽  
Scale Invariant ◽  
Photon Transport ◽  
Near Ultraviolet ◽  
Starting Point

Abstract. In this paper, we used cloud imagery from a NASA field experiment in conjunction with three-dimensional radiative transfer calculations to show that cloud spatial structure manifests itself as a spectral signature in shortwave irradiance fields – specifically in transmittance and net horizontal photon transport in the visible and near-ultraviolet wavelength range. We found a robust correlation between the magnitude of net horizontal photon transport (H) and its spectral dependence (slope), which is scale-invariant and holds for the entire pixel population of a domain. This was surprising at first given the large degree of spatial inhomogeneity. We prove that the underlying physical mechanism for this phenomenon is molecular scattering in conjunction with cloud spatial structure. On this basis, we developed a simple parameterization through a single parameter ε, which quantifies the characteristic spectral signature of spatial inhomogeneities. In the case we studied, neglecting net horizontal photon transport leads to a local transmittance bias of ±12–19 %, even at the relatively coarse spatial resolution of 20 km. Since three-dimensional effects depend on the spatial context of a given pixel in a nontrivial way, the spectral dimension of this problem may emerge as the starting point for future bias corrections.

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