發送短信 : MHD natural convection in an enclosure from two semi-circular heaters on the bottom wall

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