RETRACTED: Laminar flow and heat transfer of nanofluid between contracting and rotating disks by least square method

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of The authors have plagiarized part of a paper that had already appeared in Applied Mathematical Modelling 36 (2012) 1806–1820 https://doi.org/10.1016/j.apm.2011.09.010. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.