Retraction notice: Physical aspects of Darcy-Forchheimer bidirectional flow in carbon nanotubes (SWCNTs and MWCNTs)

The publishers of International Journal of Numerical Methods for Heat and Fluid Flow wish to retract the article Khan, M.I., Rashid, M., Hayat, T., Khan, N.B. and Alsaedi, A. (2019), “Physical aspects of Darcy-Forchheimer bidirectional flow in carbon nanotubes (SWCNTs and MWCNTs)”, International Journal of Numerical Methods for Heat and Fluid Flow, Vol. 29 No. 6, pp. 2032–2056. https://doi.org/10.1108/HFF-12-2018-0770.

 An internal investigation into a series of submissions has uncovered evidence that the peer review process was compromised. As a result of these concerns, the findings of the article cannot be relied upon. This decision has been taken in accordance with Emerald’s publishing ethics and the COPE guidelines on retractions. 

 The publishers of the journal sincerely apologize to the readers. The authors would like it to be noted that they are not in agreement with this retraction.

The retracted article is available at https://doi.org/10.1108/HFF-12-2018-0770.