Numerical Calculation of the Irreversible Entropy Production in Heat Transferring Structures
نویسندگان
چکیده
Abstract In diesem Beitrag werden zwei verschiedene additiv herstellbare Metallstrukturen hinsichtlich der Entropieproduktionszahl bewertet. Die beiden Strukturen bei Temperaturniveaus, 200/80 °C und 700/580 °C, untersucht. Bei dem niedrigen Temperaturniveau ist insbesondere die Wärmeleitung innerhalb Struktur Haupttreiber für Entropieproduktion. Werden Temperaturen angehoben, so steigt gesamte stark an, wobei Dissipation durch Fluidreibung nun Hauptursache auftretenden Verluste in ist.
منابع مشابه
Numerical calculation of granular entropy.
We present numerical simulations that allow us to compute the number of ways in which N particles can pack into a given volume V. Our technique modifies the method of Xu, Frenkel, and Liu [Phys. Rev. Lett. 106, 245502 (2011)] and outperforms existing direct enumeration methods by more than 200 orders of magnitude. We use our approach to study the system size dependence of the number of distinct...
متن کاملEntropy Production and Irreversible Processes 262 Entropy Production and Irreversible Processes - from the perspective of continuous topological evolution
A concept of entropy production associated with continuous topolog-ical evolution is deduced (without statistics) from the fact that Cartan-Hilbert 1-form of Action defines a non-equilibrium symplectic system of Pfaff Topological dimension 2n+2. The differential entropy, dS, is composed of the interior product of the non-canonical components of momentum with the components of the differential v...
متن کاملTime-dependent, irreversible entropy production and geodynamics.
We present an application of entropy production as an abstraction tool for complex processes in geodynamics. Geodynamic theories are generally based on the principle of maximum dissipation being equivalent to the maximum entropy production. This represents a restriction of the second law of thermodynamics to its upper bound. In this paper, starting from the equation of motion, the first law of ...
متن کاملRadiative entropy production-cost heat into entropy
Heat flow SQ of the First Law of Thermodynamics is expressed in terms of the entropy flow &Q/T) SQ = SIT(QIT)I = ~~(Q/~+(Q~~d~ where T&Q/T) denotes the energy equivalent of the entropy flow, and (Q/T)dT introduces the concept of lost heat into entropy production. Here Q = QK f Q R where superscripts K and R indicate conduction and radiation, respectively. In terms of the lost heat, dimensionles...
متن کاملThe Maximum Entropy Production Principle and Linear Irreversible Processes
It is shown that Onsager’s principle of the least dissipation of energy is equivalent to the maximum entropy production principle. It is known that solutions of the linearized Boltzmann equation make extrema of entropy production. It is argued, in the case of stationary processes, that this extremum is a maximum rather than a minimum.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemie Ingenieur Technik
سال: 2023
ISSN: ['0009-286X', '1522-2640']
DOI: https://doi.org/10.1002/cite.202200213