Open Access
ARTICLE
AN EXPLICIT AND CONTINUOUS FRICTION FACTOR CORRELATION FOR HELICAL TUBES WITH ARBITRARY ROUGHNESS
a University of Applied Sciences and Arts Northwestern Switzerland FHNW, Institute of Energy in Buildings, CH-4132 Muttenz, Switzerland
b Eidgenössische Technische Hochschule ETH, Laboratory of Nuclear Energy Systems, CH-8092 Zurich, Switzerland
† Corresponding author. Email: ralph.eismann@fhnw.ch