The residence time distribution for laminar flow in helically coiled tubes

✍ Scribed by E.B. Nauman

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 693 KB
• Volume: 32
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(77)80207-8

✦ Synopsis

Suable errors exmt III prevtously pubhshed studies on the residence tune dmtnbmon for ideal lammar flow 111 a hehally coded tube The numencd methods used to gwe corrected results are generally useful for Bow situations where the projections of the strcamhnes on the ctmnacl cross-sectw3n are closed curvea An asymptotic solution, vahd at long res&nce tunes, has been obtawd Tlus roluti confirms the nunencal observatton that the tail of the &stnbunon IS slrmlar to that for larmapr flow IXI a stmghttubc If molecular dtislon IS Ignored, thaw form of mbc behavior IS shown to be a general chara&ns tic of all flow systems mvolvmg a fixed wall When cbffuslon IS considered, the asymptotic remdence tnne titriimon will be a decaymg exponenti III tune TIM co&inns the wrdcspread expewental observation that residence tie dmtnbutmns have exponenti tails JNTXODUCIION Fhud flow through hehcally coded tubes has both practical and theoretical uuportance lks flow s1iilla~n