µåµð¾î ¾îÁö·¯¿ü´ø »çÀÌÆ®°¡ Á¤¸®°¡ µÇ¾ú³×¿ä. ¿î¿µÀÚ´Ô ¼ö°í¸¹À¸¼Ì³×¿ä.
Q) À§ Á¦¸ñ°ú °°ÀÌ liquid surface tensionÀÌ column¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¾Ë°í ½Í½À´Ï´Ù.
=> ¸ðµç º¯¼ö¸¦ ¹«½ÃÇÑä Ç¥¸éÀå·Â Ãø¸é¿¡¼¸¸ º¸°Ú½À´Ï´Ù. Ç¥¸éÀå·ÂÀÌ Å©´Ù´Â ¾Ö±â´Â Ç¥¸é¾×ºÐÀÚµéÀÌ °ÇÏ°Ô(ÆØÆØÇÏ°Ô) ´ç±â°í ÀÖ´Ù´Â ¾Ö±â°¡ µË´Ï´Ù. kisterÀÇ 'Distillation - Design' p278, Fair's correlationÀ» º¸¸é Ç¥¸éÀå·ÂÀº vapor velosity¿¡ ºñ·ÊÇÑ´Ù°í ³ª¿ÍÀÖ½À´Ï´Ù. ¾î¶°ÇÑ Çü»ó¿¡ ÀÇÇؼ Ç¥¸éÀå·ÂÀÌ Å©¸é ±âüÀÇ ¼Óµµ°¡ ºü¸£°Ô µÇ´Â °ÍÀÎÁö ÀÌÇØ°¡ °¡Áú ¾Ê½À´Ï´Ù.
Fair's correlation, u=C * (surface tension/20)^0.2 * sqrt(¥ñ_L-¥ñ_V/¥ñ_V)