Recently, by analyzing the measurement data of Nikuradze [NACA Tech. Memo No. 1292 (1950)], it has been proposed [N. Goldenfeld, Phys. Rev. Lett. 96, 044503 (2006)] that the friction factor, f , of rough-pipe flow obeys a scaling law in the turbulent regime. Here, we provide a phenomenological scaling argument to explain this law and demonstrate how intermittency modifies the scaling form, ther...

accident and emergency departments in east London: the contribution of practice organization, population characteristics, and distance. J Health Serv Res Policy 1997;2:6-13. 3 Morgan K, Prothero D, Frankel S. The rise in emergency admissions: crisis or artefact? Temporal analysis of health services data. BMJ 1999;319:158-9. 4 Meggs MJ, Czaplijski T, Benson T. Trends in emergency department util...

Potensi sumber daya energi terbarukan di Indonesia sangat besar. tersebut dapat dimanfaatkan untuk mendistribusikan secara merata. Salah satu pemanfaatannya yaitu dengan menggunakan turbin angin Darrieus mengubah menjadi listrik. Berbagai upaya telah dilakukan guna meningkatkan kinerja turbin. Penelitian ini studi numeric memvariasikan tinggi fin mengetahui nilai Cp, Ct dan TSR. Metode Computat...

The wind is an energy source that has the properties of a clean, free, and readily available source. However, efficiency existing rotors used to harness power still not satisfactory. Thus, in this current study, development aerodynamic performance investigation ten NACA airfoils comprising five symmetrical non-symmetrical have been analyzed through computational fluids dynamic (CFD) simulation ...

the present research simulates time-periodic unsteady transonic flow around pitching airfoils via the solution of unsteady euler and navier-stokes equations, using time spectral method (tsm) and compares it with the traditional methods such as bdf and explicit structured adaptive grid method. the tsm uses a fourier representation in time and hence solves for the periodic state directly accordin...