On bubble clustering and energy spectra in pseudo-turbulence

Analysis of Pseudo-Turbulence Flow Induced by Bubble Periodic Formation in Non-Newtonian Fluids

Laser Doppler Velocimetry (LDV) has been employed to determine pseudo-turbulence characteristics of the flow field around bubble train forming in non-Newtonian caboxymethylcellulose (CMC) aqueous solution at low gas flow rate condition. The Reynolds stress and turbulent intensity of the liquid were investigated by means of Reynolds time-averaged method. The experimental results show that ax...

Magnetohydrodynamic Turbulence: Generalized Energy Spectra

A general framework that incorporates the Iroshnikov-Kraichnan (IK) and Goldreich-Sridhar (GS) phenomenalogies of magnetohydrodynamic (MHD) turbulence is developed. This affords a clarification of the regimes of validity of IK and GS phenomenalogies and hence help resolve some controversies in this problem. Magnetohydrodynamic (MHD) flows that occur naturally (like astrophysical situations) and...

Energy spectra in elasto-inertial turbulence

economic optimization and energy consumption in tray dryers

دراین پروژه به بررسی مدل سازی خشک کردن مواد غذایی با استفاده از هوای خشک در خشک کن آزمایشگاهی نوع سینی دار پرداخته شده است. برای آنالیز انتقال رطوبت در طی خشک شدن به طریق جابجایی، یک مدل لایه نازک برای انتقال رطوبت، مبتنی بر معادله نفوذ فیک در نظر گفته شده است که شامل انتقال همزمان جرم و انرژی بین فاز جامد و گاز می باشد. پروفایل دما و رطوبت برای سه نوع ماده غذایی شامل سیب زمینی، سیب و موز در طی...

Large-scale energy spectra in surface quasi-geostrophic turbulence

is studied. The nonlinear transfer of this system conserves the two quadratic quantities Ψ1 = 〈[(−∆) ψ]〉/2 and Ψ2 = 〈[(−∆) ψ]〉/2 (kinetic energy), where 〈·〉 denotes a spatial average. The energy density Ψ2 is bounded and its spectrum Ψ2(k) is shallower than k in the inverse-transfer range. For bounded turbulence, Ψ2(k) in the low-wavenumber region can be bounded by Ck where C is a constant inde...