Results 61 to 70 of about 142,725 (269)

Finite-time thermodynamics efficiency modeling insights of direct steam generation solar power plants with linear Fresnel reflectors

International Journal of Thermofluids
Comprehending thermal system limits is crucial for enhancing and optimizing energy systems. Finite-time thermodynamics reveals a relationship between efficiency and maximum power output.
Eduardo González-Mora, Ma. Dolores Durán-García   +1 more
doaj   +1 more source

What is thermodynamics and what is it for? [PDF]

Interdisciplinary Description of Complex Systems, 2012
Thermodynamics – contrary to its name – is not a dynamic theory. However, some relatively new developments, like finite time, endo-reversible or ordinary thermodynamics introduce time into thermostatics.
Péter Ván, Gyula Gróf
doaj  

Thermodynamics of Relativistic Fermions with Chern-Simons Coupling

, 1994
We study the thermodynamics of the relativistic Quantum Field Theory of massive fermions in three space-time dimensions coupled to an Abelian Maxwell-Chern-Simons gauge field.
A. Das, A. Dasnières de Veigy, A. Foerster, A. Foerster, C. Bernard, C.R. Hagen, C.R. Hagen, C.R. Hagen, Chihong Chou, D. Cabra, E. Poppitz, F. A. Schaposnik, G.W. Semenoff, G.W. Semenoff, H.E. Haber, I.J.R. Aitchison, J. Frölich, J.D. Lykken, K. Actor, K. Actor, K. Babu, K. Haller, K. Shizuya, M. Lüscher, M.A. Valle Basagoiti, N. Bralić, R. Banerjee, R. Emparan, R. Iengo, R.B. Laughlin, R.B. Laughlin, R.E. Gamboa Saraví, S. Coleman, Y. C. Kao, Y. Hosotani   +34 more
core   +2 more sources

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

Van der Waals gas as working substance in a Curzon and Ahlborn-Novikov engine

Entropy, 2005
: Using a van der Waals gas as the working substance the so called Curzon and Ahlborn-Novikov engine is studied. It is shown that some previous results found in the literature of finite time thermodynamics can be written in a more general form, means of ...
Delfino Ladino-Luna
doaj   +1 more source

Efficiency at maximum power: An analytically solvable model for stochastic heat engines

, 2007
We study a class of cyclic Brownian heat engines in the framework of finite-time thermodynamics. For infinitely long cycle times, the engine works at the Carnot efficiency limit producing, however, zero power. For the efficiency at maximum power, we find
Feynman R. P., Kulic I. M., Sokolov I. M., T. Schmiedl, U. Seifert, van den Broeck C., Velasco S.   +6 more
core   +1 more source

Investigation of Oxygen‐Free Wetting Behavior of Aluminum on Copper via Molecular Dynamics Simulations and Experiments

Advanced Engineering Materials, EarlyView.
The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu, Timon Steinhoff, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Christian Klose, Ludger Overmeyer, Hans‐Jürgen Maier, Nina Merkert   +8 more
wiley   +1 more source

Microscopic theory of vortex dynamics in homogeneous superconductors

, 1999
Vortex dynamics in fermionic superfluids is carefully considered from the microscopic point of view. Finite temperatures, as well as impurities, are explicitly incorporated.
A. L. Fetter, A. O. Caldeira, A. van Otterlo, C. Wexler, D. J. Thouless, D. J. Thouless, D. M. Gaitonde, D. Vollhardt, E. G. d’Agliano, E. Šimánek, G. D. Mahan, G. E. Volovik, H. B. Callen, J. Bardeen, J. Bardeen, J. D. Jackson, J. I. Gittleman, J. M. Tang, L. Bönig, L. E. Ballentine, M. Huberman, M. Ma, M. R. Geller, M. Stone, M. Tinkham, N. B. Kopnin, N. Papanicolaou, P. Ao, P. Ao, P. Ao, P. Ao, P. Ao, P. Ao, P. G. de Gennes, P. Nozières, Q. Niu, R. Kubo, R. M. Cleary, R. S. Rishman, S. Hofmann, S. Mabkawa, T. A. Brody, X.-M. Zhu, X.-M. Zhu, X.-M. Zhu, Y. Aharonov, Y.-C. Chen   +46 more
core   +1 more source

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

Advanced Engineering Materials, EarlyView.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk, Farhan Hossain, Felipe A. Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Universal finite-time thermodynamics of many-body quantum machines from Kibble-Zurek scaling

Physical Review Research, 2020
We demonstrate the existence of universal features in the finite-time thermodynamics of quantum machines by considering a many-body quantum Otto cycle in which the working medium is driven across quantum critical points during the unitary strokes ...
Revathy B. S, Victor Mukherjee, Uma Divakaran, Adolfo del Campo   +3 more
doaj   +1 more source