scholarly journals pH‐Induced Fluorescence and Thermal Relaxation Rate Modulation in a Hydrazone Photoswitch

ChemPhotoChem ◽  
2019 ◽  
Vol 3 (6) ◽  
pp. 361-364 ◽  
Author(s):  
Baihao Shao ◽  
Ivan Aprahamian
Keyword(s):  
Relaxation Rate ◽  
Thermal Relaxation ◽  
Rate Modulation

General Properties of Thermal-Relaxation Rate Equations

1973 ◽  
Vol 8 (7) ◽  
pp. 3487-3487
Author(s):  
M. W. P. Strandberg ◽  
J. R. Shane
Keyword(s):  
Relaxation Rate ◽  
Thermal Relaxation ◽  
Rate Equations ◽  
General Properties

General Properties of Thermal-Relaxation Rate Equations

1973 ◽  
Vol 7 (11) ◽  
pp. 4809-4812 ◽  
Author(s):  
M. W. P. Strandberg ◽  
J. R. Shane
Keyword(s):  
Relaxation Rate ◽  
Thermal Relaxation ◽  
Rate Equations ◽  
General Properties

scholarly journals Vertical Transition in Transport and Mixing in Baroclinic Flows

2008 ◽  
Vol 65 (4) ◽  
pp. 1137-1157 ◽  
Author(s):  
M. D. Greenslade ◽  
P. H. Haynes
Keyword(s):  
Relaxation Rate ◽  
Channel Model ◽  
Gaussian Function ◽  
Plane Channel ◽  
Lower Boundary ◽  
Thermal Relaxation ◽  
Vertical Shear ◽  
Large Set ◽  
Transport Barrier ◽  
Transport And Mixing

Abstract Numerical simulations in multilevel baroclinic turbulence in a β-plane channel model are discussed, focusing on the transport and mixing behavior. The temperature field in the model is relaxed toward a field consistent with a broad zonal jet with vertical shear that is a Gaussian function of the cross-channel coordinate. The resulting statistical equilibrium flow includes an active baroclinic eddy field. The transport and mixing properties are analyzed by considering the fields of potential vorticity and a passive tracer (from which effective diffusivities/equivalent lengths are calculated). The upper part of the flow organizes itself in such a way that there is a transport barrier in the center of the channel, with eddy mixing regions on either side. In the lower part of the flow the eddy mixing occurs across a single broad region, with no central transport barrier. The transition between these two regimes takes place abruptly at a height zT. A large set of simulations is used to map out the variation of zT as a function of external parameters including β, the thermal relaxation rate κT, and the (lower boundary) frictional relaxation rate κM (applied in the lowest model layer only). The transition height zT is argued to be relevant to sharp vertical transitions in transport and mixing observed in atmospheric and oceanic flows.

scholarly journals Field-dependent prefactor of the thermal relaxation rate in single-domain magnetic particles

1993 ◽  
Vol 48 (21) ◽  
pp. 15823-15828 ◽  
Author(s):  
Ivo Klik ◽  
Ching-Ray Chang ◽  
Huei Li Huang
Keyword(s):  
Relaxation Rate ◽  
Magnetic Particles ◽  
Thermal Relaxation ◽  
Single Domain ◽  
Field Dependent

Nonmonotonic dependence of magnetic viscosity on thermal relaxation rate

1995 ◽  
Vol 52 (5) ◽  
pp. 3053-3055
Author(s):  
J. Lee ◽  
Ivo Klik ◽  
Ching-Ray Chang
Keyword(s):  
Relaxation Rate ◽  
Thermal Relaxation ◽  
Nonmonotonic Dependence ◽  
Magnetic Viscosity

Burgers fluid flow in perspective of Buongiorno’s model with improved heat and mass flux theory for stretching cylinder

2020 ◽  
Vol 92 (3) ◽  
pp. 31101
Author(s):  
Zahoor Iqbal ◽  
Masood Khan ◽  
Awais Ahmed
Keyword(s):  
Diffusion Process ◽  
Mathematical Formulation ◽  
Thermal Relaxation ◽  
Mass Diffusion ◽  
Stretching Cylinder ◽  
Discussion Section ◽  
Buongiorno’S Model ◽  
Homotopy Analysis ◽  
Burgers Fluid ◽  
Diffusion Phenomena

In this study, an effort is made to model the thermal conduction and mass diffusion phenomena in perspective of Buongiorno’s model and Cattaneo-Christov theory for 2D flow of magnetized Burgers nanofluid due to stretching cylinder. Moreover, the impacts of Joule heating and heat source are also included to investigate the heat flow mechanism. Additionally, mass diffusion process in flow of nanofluid is examined by employing the influence of chemical reaction. Mathematical modelling of momentum, heat and mass diffusion equations is carried out in mathematical formulation section of the manuscript. Homotopy analysis method (HAM) in Wolfram Mathematica is utilized to analyze the effects of physical dimensionless constants on flow, temperature and solutal distributions of Burgers nanofluid. Graphical results are depicted and physically justified in results and discussion section. At the end of the manuscript the section of closing remarks is also included to highlight the main findings of this study. It is revealed that an escalation in thermal relaxation time constant leads to ascend the temperature curves of nanofluid. Additionally, depreciation is assessed in mass diffusion process due to escalating amount of thermophoretic force constant.

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