fluent用進口邊界條件隨時間正弦變化的UDF代碼，在讀入fluent文件之後選擇user-defined，在邊界條件中選擇相應的壓力和溫度邊界即可。-fluent imported boundary conditions change over time sine UDF code, after reading the fluent file selection user-defined, the appropriate pressure and temperature boundary