أرسل هذا في رسالة قصيرة: Determining the critical condition for turbulent transition in a full-developed annulus flow

 _    _     _____     ____       ___     _    _   
| \  / ||  |  ___||  |  _ \\    / _ \\  | |  | || 
|  \/  ||  | ||__    | |_| ||  | / \ || | |/\| || 
| .  . ||  | ||__    | .  //   | \_/ || |  /\  || 
|_|\/|_||  |_____||  |_|\_\\    \___//  |_// \_|| 
`-`  `-`   `-----`   `-` --`    `---`   `-`   `-`