scholarly journals Dutch Hybrid Neighbourhoods of 1860–1910 in Heat Transition

2020 ◽  
Author(s):  
Leo Oorschot
Keyword(s):  
Heat Transition

scholarly journals Fractional order stagnation point flow of the hybrid nanofluid towards a stretching sheet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Anwar Saeed ◽  
Muhammad Bilal ◽  
Taza Gul ◽  
Poom Kumam ◽  
Amir Khan ◽  
...  
Keyword(s):  
Stagnation Point ◽  
Fractional Order ◽  
Transition Rate ◽  
Stretching Sheet ◽  
Stagnation Point Flow ◽  
Hybrid Nanofluid ◽  
Fractional Order Differential Equations ◽  
Classical Calculus ◽  
Electric And Magnetic Fields ◽  
Heat Transition

AbstractFractional calculus characterizes a function at those points, where classical calculus failed. In the current study, we explored the fractional behavior of the stagnation point flow of hybrid nano liquid consisting of TiO2 and Ag nanoparticles across a stretching sheet. Silver Ag and Titanium dioxide TiO2 nanocomposites are one of the most significant and fascinating nanocomposites perform an important role in nanobiotechnology, especially in nanomedicine and for cancer cell therapy since these metal nanoparticles are thought to improve photocatalytic operation. The fluid movement over a stretching layer is subjected to electric and magnetic fields. The problem has been formulated in the form of the system of PDEs, which are reduced to the system of fractional-order ODEs by implementing the fractional similarity framework. The obtained fractional order differential equations are further solved via fractional code FDE-12 based on Caputo derivative. It has been perceived that the drifting velocity generated by the electric field E significantly improves the velocity and heat transition rate of blood. The fractional model is more generalized and applicable than the classical one.

scholarly journals Building protoplanetary disks from the molecular cloud: redefining the disk timeline

2019 ◽  
Vol 624 ◽  
pp. A93 ◽  
Author(s):  
K. Baillié ◽  
J. Marques ◽  
L. Piau
Keyword(s):  
Molecular Cloud ◽  
Protoplanetary Disk ◽  
Giant Planets ◽  
Type I ◽  
Initial State ◽  
Disk Formation ◽  
Heat Transition ◽  
Cloud Material ◽  
Selection Of ◽  
Collapse Phase

Context. Planetary formation models are necessary to understand the characteristics of the planets that are the most likely to survive. Their dynamics, their composition and even the probability of their survival depend on the environment in which they form. We therefore investigate the most favorable locations for planetary embryos to accumulate in the protoplanetary disk: the planet traps. Aims. We study the formation of the protoplanetary disk by the collapse of a primordial molecular cloud, and how its evolution leads to the selection of specific types of planets. Methods. We use a hydrodynamical code that accounts for the dynamics, thermodynamics, geometry and composition of the disk to numerically model its evolution as it is fed by the infalling cloud material. As the mass accretion rate of the disk onto the star determines its growth, we can calculate the stellar characteristics by interpolating its radius, luminosity and temperature over the stellar mass from pre-calculated stellar evolution models. The density and midplane temperature of the disk then allow us to model the interactions between the disk and potential planets and determine their migration. Results. At the end of the collapse phase, when the disk reaches its maximum mass, it pursues its viscous spreading, similarly to the evolution from a minimum mass solar nebula (MMSN). In addition, we establish a timeline equivalence between the MMSN and a “collapse-formed disk” that would be older by about 2 Myr. Conclusions. We can save various types of planets from a fatal type-I inward migration: in particular, planetary embryos can avoid falling on the star by becoming trapped at the heat transition barriers and at most sublimation lines (except the silicates one). One of the novelties concerns the possible trapping of putative giant planets around a few astronomical units from the star around the end of the infall. Moreover, trapped planets may still follow the traps outward during the collapse phase and inward after it. Finally, this protoplanetary disk formation model shows the early possibilities of trapping planetary embryos at disk stages that are anterior by a few million years to the initial state of the MMSN approximation.

Heat transition in the European building sector: Overview of the heat decarbonisation practices through heat pump technology

2021 ◽  
Vol 48 ◽  
pp. 101630
Author(s):  
Mohammad Hosein Abbasi ◽  
Badr Abdullah ◽  
Muhammad Waseem Ahmad ◽  
Ali Rostami ◽  
Jeff Cullen
Keyword(s):  
Heat Pump ◽  
Building Sector ◽  
Heat Transition

Etude quantitative de l'énergie libre de PbZrO3 pur et dopé avec Nb2O5

1969 ◽  
Vol 47 (22) ◽  
pp. 2439-2443 ◽  
Author(s):  
L. Benguigui ◽  
H. Hervet
Keyword(s):  
Free Energy ◽  
Ferroelectric Phase ◽  
Paraelectric Phase ◽  
Temperature Phase ◽  
Phase Determination ◽  
Electrical Field ◽  
Antiferroelectric Phase ◽  
Field Temperature ◽  
Heat Transition

Pure and Nb2O5 doped PbZrO3 exhibit the following phases: antiferroelectric, ferroelectric, and paraelectric. By means of measurements of heat transition, dielectric constant in paraelectric phase, determination of electrical field – temperature phase diagrams, we calculate the free energy of each phase. Given that the free energy can be developed in powers of the polarization, we show the coefficients of the ferroelectric phase are slightly modified by the addition of Nb2O5, while those of the antiferroelectric phase vary by a factor greater than two.

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