caa a22 4500 386367450 CHVBK 20180307111941.0 cr unu---uuuuu 161130e198902 xx s 000 0 eng 10.1017/S0022377800013660 doi S0022377800013660 pii (NATIONALLICENCE)cambridge-10.1017/S0022377800013660 Forced Alfvén-wave turbulence and subgrid-scale closure [Elektronische Daten] The renormalization-group method is applied to the problem of forced turbulence in the simplified Alfvén model of Chen and Mahajan. The effects of small unresolvable subgrid modes on the large-scale turbulence leads to a renormalized response function ε. In certain limits, the resulting recursion relation for the response function can be converted into a differential equation that can be solved analytically. For Gaussian forcing terms satisfying a power-law wavenumber correlation k-y but white-noise frequency spectrum, it is found that the response function exhibits second-harmonic generation of waves at frequency ω = 2ΛvA for all exponents y ≥ 0, where Λ is the wavenumber separating the subgrid and supergrid modes. Copyright © Cambridge University Press 1989 Zhou Ye Bartol Research Institute, University of Delaware, Newark, Delaware 19716, U.S.A. Vahala George Department of Physics, College of William and Mary, Williamsburg, Virginia 23185, U.S.A. Journal of Plasma Physics Cambridge University Press 41/1(1989-02), 67-81 0022-3778 41:1<67 1989 41 PLA https://doi.org/10.1017/S0022377800013660 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022377800013660 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhou Ye Bartol Research Institute, University of Delaware, Newark, Delaware 19716, U.S.A NATIONALLICENCE 700 1- Vahala George Department of Physics, College of William and Mary, Williamsburg, Virginia 23185, U.S.A NATIONALLICENCE 773 0- Journal of Plasma Physics Cambridge University Press 41/1(1989-02), 67-81 0022-3778 41:1<67 1989 41 PLA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge