Formation of large-scale semiorganized structures in turbulent convection

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Formation of large-scale semiorganized structures in turbulent convection.

A new mean-field theory of turbulent convection is developed by considering only the small-scale part of spectra as "turbulence" and the large-scale part, as a "mean flow," which includes both regular and semiorganized motions. The developed theory predicts the convective wind instability in a shear-free turbulent convection. This instability causes formation of large-scale semiorganized fluid ...

متن کامل

Generation of Large-scale Semi-organized Structures in Turbulent Convection

In the last decades it has been recognized that the very high Rayleigh number convective boundary layer (CBL) has more complex nature than might be reckoned. Besides the fully organized component naturally considered as the mean flow and the chaotic small-scale turbulent fluctuations, one more type of motion has been discovered, namely, long-lived large-scale structures, which are neither turbu...

متن کامل

Large-scale velocity structures in turbulent thermal convection.

A systematic study of large-scale velocity structures in turbulent thermal convection is carried out in three different aspect-ratio cells filled with water. Laser Doppler velocimetry is used to measure the velocity profiles and statistics over varying Rayleigh numbers Ra and at various spatial positions across the whole convection cell. Large velocity fluctuations are found both in the central...

متن کامل

Effect of large-scale coherent structures on turbulent convection.

We study an effect of large-scale coherent structures on global properties of turbulent convection in laboratory experiments in air flow in a rectangular chamber with aspect ratios A approximately 2 and A approximately 4 (with the Rayleigh numbers varying in the range from 5x10;{6} to 10;{8} ). The large-scale coherent structures comprise the one-cell and two-cell flow patterns. We found that a...

متن کامل

Magnetic fluctuations and formation of large-scale inhomogeneous magnetic structures in a turbulent convection.

Magnetic fluctuations generated by a tangling of the mean magnetic field by velocity fluctuations are studied in a developed turbulent convection with large magnetic Reynolds numbers. We show that the energy of magnetic fluctuations depends on the magnetic Reynolds number only when the mean magnetic field is smaller than B(eq)/4Rm(1/4), where B(eq) is the equipartition mean magnetic field deter...

متن کامل

ذخیره 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: Physical Review E

سال: 2002

ISSN: 1063-651X,1095-3787

DOI: 10.1103/physreve.66.066305