RETRACTION: Numerical investigation of nanofluid flow and heat transfer in a pillow plate heat exchanger using a two‐phase model: Effects of the shape of the welding points used in the pillow plate

RETRACTION: Y. A. Al‐Turki, A. Yarmohammadi, A. Alizadeh, D. Toghraie, “Numerical investigation of nanofluid flow and heat transfer in a pillow plate heat exchanger using a two‐phase model: Effects of the shape of the welding points used in the pillow plate,” Zeitschrift für Angewandte Mathematik und Mechanik (Early View): https://doi.org/10.1002/zamm.202000300.The above article, published online on 14 January 2021 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the journal Editor‐in‐Chief, Holm Altenbach; and Wiley‐VCH GmbH. The retraction has been agreed as there is unambiguous evidence that this article was accepted on the basis of a compromised peer review process. Therefore, the review of this article is deemed to be insufficient. The authors disagree with the retraction.