أرسل هذا في رسالة قصيرة: Mathematical modeling of closed-End pulsating heat pipes pperating with a bottom heat mode

 _____      _____     _  __    _____     ______  
|  __ \\   |  ___||  | |/ //  |  ___||  /_   _// 
| |  \ ||  | ||__    | ' //   | ||__    `-| |,-  
| |__/ ||  | ||__    | . \\   | ||__      | ||   
|_____//   |_____||  |_|\_\\  |_____||    |_||   
 -----`    `-----`   `-` --`  `-----`     `-`'