\documentclass[a4paper]{article}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{wasysym}
\usepackage[labelfont=bf]{caption}
\usepackage[margin={1cm,1cm}]{geometry}
\usepackage{multicol}
\usepackage{graphicx,float}
\usepackage{enumerate}
\usepackage{xepersian}
\settextfont{XB Niloofar}
\begin{document}
\begin{multicols}{2}
\begin{latin}
\begin{enumerate}
\begin{LTR}
\item
Reynolds O (1883) An experimental investigation of the circumstances which determine
whether the motion of water shall be direct or sinuous, and of the law of
resistance in parallel channels. Philos Trans R Soc A 174:935–982.
\item
Mullin T (2011) Experimental studies of transition to turbulence in a pipe. Annu Rev
Fluid Mech 43:1–24.
\item
Eckhardt B (2011) A critical point for turbulence. Science 333:165–166.
\item
Faisst H, Eckhardt B (2003) Traveling waves in pipe flow. Phys Rev Lett 91(22):224502.
\item
Hof B, et al. (2004) Experimental observation of nonlinear traveling waves in turbulent
pipe flow. Science 305(5690):1594–1598.
\item
Peixinho J, Mullin T (2006) Decay of turbulence in pipe flow. Phys Rev Lett 96(9):094501.
\item
Hof B, Westerweel J, Schneider TM, Eckhardt B (2006) Finite lifetime of turbulence in
shear flows. Nature 443(7107):59–62.
\item
Willis AP, Peixinho J, Kerswell RR, Mullin T (2008) Experimental and theoretical progress
in pipe flow transition. Philos Trans A Math Phys Eng Sci 366(1876):2671–2684.
\item
Moxey D, Barkley D (2010) Distinct large-scale turbulent-laminar states in transitional
pipe flow. Proc Natl Acad Sci USA 107(18):8091–8096.
\end{LTR}
\end{enumerate}
\end{latin}
\end{multicols}
\end{document}