Predictability and energy transfer properties of a quasi-geostropic, uniform potential vorticity, low-order dynamical system

1983 ◽  
Author(s):  
William Blumen
Keyword(s):  
Dynamical System ◽  
Energy Transfer ◽  
Potential Vorticity ◽  
Transfer Properties ◽  
Low Order

scholarly journals Study of photoluminescence and energy transfer properties of an organic dye salt doped thin films

2008 ◽  
Vol 57 (5) ◽  
pp. 3267
Author(s):  
Xu Deng ◽  
Ye Li-Hua ◽  
Cui Yi-Ping ◽  
Xi Jun ◽  
Li Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Energy Transfer ◽  
Organic Dye ◽  
Transfer Properties

Temperature-dependent luminescence and energy transfer properties of Tb3+ and Eu3+ doped barium borate glasses

2017 ◽  
Vol 181 ◽  
pp. 31-35 ◽  
Author(s):  
Sebastian Loos ◽  
Franziska Steudel ◽  
Bernd Ahrens ◽  
Stefan Schweizer
Keyword(s):  
Energy Transfer ◽  
Borate Glasses ◽  
Barium Borate ◽  
Temperature Dependent ◽  
Transfer Properties

Luminescence and energy transfer properties of Gd3+ and Tb3+ in LaAlGe2O7

2008 ◽  
Vol 146 (1-3) ◽  
pp. 225-230 ◽  
Author(s):  
Yu-Chun Li ◽  
Yee-Shin Chang ◽  
Yu-Cheng Lai ◽  
Yi-Jing Lin ◽  
Chih-Hao Laing ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Transfer Properties

scholarly journals Examination of large-scale structures in a turbulent plane mixing layer. Part 2. Dynamical systems model

2001 ◽  
Vol 441 ◽  
pp. 67-108 ◽  
Author(s):  
L. UKEILEY ◽  
L. CORDIER ◽  
R. MANCEAU ◽  
J. DELVILLE ◽  
M. GLAUSER ◽  
...  
Keyword(s):  
Dynamical System ◽  
Velocity Field ◽  
Large Scale ◽  
Stokes Equations ◽  
Temporal Dynamics ◽  
Mixing Layer ◽  
Basis Set ◽  
Large Scale Structures ◽  
Scale Structures ◽  
Low Order

The temporal dynamics of large-scale structures in a plane turbulent mixing layer are studied through the development of a low-order dynamical system of ordinary differential equations (ODEs). This model is derived by projecting Navier–Stokes equations onto an empirical basis set from the proper orthogonal decomposition (POD) using a Galerkin method. To obtain this low-dimensional set of equations, a truncation is performed that only includes the first POD mode for selected streamwise/spanwise (k1/k3) modes. The initial truncations are for k3 = 0; however, once these truncations are evaluated, non-zero spanwise wavenumbers are added. These truncated systems of equations are then examined in the pseudo-Fourier space in which they are solved and by reconstructing the velocity field. Two different methods for closing the mean streamwise velocity are evaluated that show the importance of introducing, into the low-order dynamical system, a term allowing feedback between the turbulent and mean flows. The results of the numerical simulations show a strongly periodic flow indicative of the spanwise vorticity. The simulated flow had the correct energy distributions in the cross-stream direction. These models also indicated that the events associated with the centre of the mixing layer lead the temporal dynamics. For truncations involving both spanwise and streamwise wavenumbers, the reconstructed velocity field exhibits the main spanwise and streamwise vortical structures known to exist in this flow. The streamwise aligned vorticity is shown to connect spanwise vortex tubes.

Meso-Tetrapyrenylporphyrins: Synthesis, structural, spectral, electrochemical properties and Förster energy transfer (FRET) studies

2020 ◽  
Vol 24 (05n07) ◽  
pp. 985-992
Author(s):  
Tawseef Ahmad Dar ◽  
Amir Sohel Bulbul ◽  
Muniappan Sankar ◽  
Karl M. Kadish
Keyword(s):  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Redox Potentials ◽  
Free Base ◽  
Efficient Energy Transfer ◽  
Förster Energy Transfer ◽  
Porphyrin Core ◽  
Transfer Properties ◽  
Insight Into

Meso-tetrapyrenylporphyrin and its metal (Co[Formula: see text], Cu[Formula: see text], Ni[Formula: see text] and Zn[Formula: see text]) complexes were synthesized, characterized and studied for their spectral, electrochemical and energy transfer properties. DFT optimization was carried out to gain an insight into the interactions between the porphyrin [Formula: see text]-system and the pyrenyl substituents. The pyrenyl substituents and the porphyrin core remain essentially orthogonal to each other in both the free base and the metallated porphyrins. Redox potentials of the pyrenylporphyrins are marginally shifted as compared to their corresponding phenyl derivatives. Förster resonance energy transfer (FRET) studies were carried out in toluene for free-base pyrenylporphyrin and its Zn(II) complex. Since pyrene is a good donor, an efficient energy transfer from pyrene (D) to the porphyrin core (A) on the order of 80–85% was observed for these two compounds. It was observed that energy transfer occurs mainly via ”through-bond” (TB) interaction rather than ”through-space” (TS) interaction.

Tunable luminescence and energy transfer properties based on La2O3-P2O5:Dy3+/Tm3+ glasses

2019 ◽  
Vol 30 (13) ◽  
pp. 12100-12106
Author(s):  
Tao Zhang ◽  
Jingxuan Wang ◽  
Yifan Xin ◽  
Xin Wang ◽  
Libo Yuan
Keyword(s):  
Energy Transfer ◽  
Transfer Properties

Tunable luminescence and energy transfer properties in Ca2NaMg2V3O12: Ln3+ (Dy3+, Sm3+) phosphors

2019 ◽  
Vol 787 ◽  
pp. 815-822 ◽  
Author(s):  
Lixin Yang ◽  
Xiaoyun Mi ◽  
Huiling Zhang ◽  
Xiyan Zhang ◽  
Zhaohui Bai ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Transfer Properties
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