Kim Kwang Ho Yoon Seong Young HUR NAHM KEON 2024-02-21T05:13:14Z 2024-02-21T05:13:14Z 1992-08 https://pubs.kist.re.kr/handle/201004/148986 twist ratio torsion effect spiral tube friction factor Effect of torsion on flows in spiral tubes with square cross section. Effect of torsion on flows in spiral tubes with square cross section. Book 1250 1253 The fifth Asian congress of fluid mechanics