Multiple gas jet impingement cooling for quenching is a very promising approach for increasing the heat transfer coefficients (h) and thus the overall cooling rates in the gas-quenching process. Appropriate correlations for h were selected based on an extensive critical literature review, and used in a numerical heat conduction model and a numerical phase transformation model which were develop...

     Resonance light scattering (RLS) intensity of silver nanoparticles in the presence of sodium dodecylsulphate was quenched on addition of sulfasalzine. The quenching extent was shown to be proportional to the sulfasalazine concentration. Effect of different parameters such as pH, volume and kind of buffer, silver nanoparticles concentration, sodium dodecylsulphate (SDS) concentration, and w...

Article history: Received 10.9.2012 Received in revised form 10.12.2012 Accepted 10.12.2012 27SiMn steels with different original structures were zero time holding quenched after pretreatments including general quenching and normalizing, respectively, then their tensile strength and hardness were determined and also microstructures were analyzed.. The experimental results show that thus quenche...

Frank Terjung and Karlheinz M aier Department of physics, Carl von Ossietzky-University Oldenburg, D-26111 Oldenburg, Germany Z. Naturforsch. 53c, 27-32 (1998); received October 9/October 31, 1997 Delayed Fluorescence, Energy Quenching, Pisum sativum , Xanthophyll Cycle Delayed chlorophyll fluorescence decay measurements on the second time scale were ap­ plied to investigate the state of photos...

This Master’s Thesis compares two computational fluid dynamics solvers: the commercial solver ANSYS CFX and the open source code OpenFOAM. Simple benchmark cases with compressible and incompressible flows are tested and compared. Thereafter the more complex process of quenching in coal gasification is simulated. This thesis work describes the simulation of a part of the coal gasification proces...

ABSTRACT The time-scales for galaxy quenching offer clues to its underlying physical drivers. We investigate central in the IllustrisTNG 100-1 simulation, their evolution over time, and pre-quenching properties of galaxies that predict time-scales. Defining duration ?q as time between crossing specific star formation rate (sSFR) thresholds, we find ${\sim} 40{{\ \rm per\ cent}}$ quench rapidly ...

the quenching of quinine fluorescence intensity in the presence of some anions in aqueous solution at ambient temperature has been investigated. the quenching is found to be collisional or dynamical in nature. this study reveals the order of two groups of quencher: nai > nabr > nacl > naf and k2cr2o7 > kmno4 >na2so4 > naclo3. increasing anion size in the both groups leads to an  increase in the...

This study concerns with the quenching features of solutions non-Newtonian filtration equation. Various conditions on initial condition are shown to guarantee at either left or right boundary. Theoretical rates and lower bounds time determined certain cases. Numerical experiments provided illustrate provide additional validation theoretical predictions times.

In this paper, we study the finite time quenching phenomenon of a nonlinear diffusion equation with nonlinear source and singular boundary flux. It is shown that the solution must quench in a finite time and the time derivative blows up at a quenching point. The quenching set and rate are determined.

In this paper, we study the semidiscrete approximation for the following initial-boundary value problem  ut(x, t) = uxx(x, t) + λf(x)(1− u(x, t))−p, −l < x < l, t > 0, u(−l, t) = 0, u(l, t) = 0, t > 0, u(x, 0) = u0(x) ≥ 0, −l ≤ x ≤ l, where p > 1, λ > 0 and f(x) ∈ C([−l, l]), symmetric and nondecreasing on the interval (−l, 0), 0 < f(x) ≤ 1, f(−l) = 0, f(l) = 0 and l = 1 2 . We find some cond...