發送短信 : Vortex shedding behind an inclined flat plate hinged with a trailing-edge flap

            _____     _____     ______    _____   
  ____     |  ___||  |__  //   /_   _//  /  ___|| 
 |    \\   | ||__      / //     -| ||-  | // __   
 | [] ||   | ||__     / //__    _| ||_  | \\_\ || 
 |  __//   |_____||  /_____||  /_____//  \____//  
 |_|`-`    `-----`   `-----`   `-----`    `---`   
 `-`