Mixing in modulated turbulence. Analytical results
نویسندگان
چکیده
منابع مشابه
Mixing in modulated turbulence. Analytical results
Recent numerical results show that if a scalar is mixed by periodically forced turbulence, the average mixing rate is directly affected for forcing frequencies small compared to the integral turbulence frequency. We elucidate this by an analytical study using simple turbulence models for spectral transfer. Adding a large amplitude modulation to the forcing of the velocity field enhances the ene...
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Isotropic and homogeneous turbulence driven by an energy input modulated in time is studied within a variable range mean-field theory. The response of the system, observed in the second-order moment of the large-scale velocity difference D(L,t)=<<(u(x+L)-u(x))(2)>> proportional, variant Re(2)(t), is calculated for varying modulation frequencies omega and weak modulation amplitudes. For low freq...
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........................................................................................................................... xv CHAPTER 1: GENERAL INTRODUCTION ......................................................................... 1 Significance and Problem Definition ............................................................................ 1 Objectives .......................................
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ژورنال
عنوان ژورنال: Computers & Fluids
سال: 2017
ISSN: 0045-7930
DOI: 10.1016/j.compfluid.2016.10.024