Correction to: Effect of interfacial drag force model on code prediction for upward adiabatic two-phase bubbly flow in vertical channels

The article “Effect of interfacial drag force model on code prediction for upward adiabatic two-phase bubbly flow in vertical channels” written by Takashi Hibiki and Tetsuhiro Ozaki, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on 04 January 2020 without open access. After publication in Volume 2, Issue 4, page 212–224, the author(s) decided to opt for Open Choice and to make the article an open access publication. Therefore, the copyright of the article has been changed to © The Author(s) 2020 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.