Irreversibility in an ideal fluid

 

Đã lưu trong:
Chi tiết về thư mục
Tác giả: Jenkins Villalobos, Alejandro
Định dạng: artículo original
Ngày xuất bản:2014
Miêu tả:When a real fluid is expelled quickly from a tube, it forms a jet separated from the surrounding fluid by a thin, turbulent layer. On the other hand, when the same fluid is sucked into the tube, it comes in from all directions, forming a sink-like flow. We show that, even for the ideal flow described by the time-reversible Euler equation, an experimenter who only controls the pressure in a pump attached to the tube would see jets form in one direction exclusively. The asymmetry between outflow and inflow therefore does not depend on viscous dissipation, but rather on the experimenter's limited control of initial and boundary conditions. This illustrates, in a rather different context from the usual one of thermal physics, how irreversibility may arise in systems whose microscopic dynamics are fully reversible.
Quốc gia:Kérwá
Tổ chức giáo dục:Universidad de Costa Rica
Repositorio:Kérwá
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/29495
Truy cập trực tuyến:http://aapt.scitation.org/doi/10.1119/1.4890941
https://hdl.handle.net/10669/29495
Từ khóa:jets
irreversibility
Euler equation
Machian propulsion