Unsteady axisymmetric radiative Cu-Al2O3/H2O flow over a radially stretching/shrinking surface

• Main Authors: Md Arifin, Norihan, Khashi'ie, Najiyah Safwa, Pop, Ioan Mihai
• Format: Article
• Language: English
• Published: Elsevier B.V. 2022
• Online Access: http://eprints.utem.edu.my/id/eprint/26363/2/KHASHI%27IE%20ET%20AL.%20%282022%29-CJPH.PDF; http://eprints.utem.edu.my/id/eprint/26363/; https://pdf.sciencedirectassets.com/314316/1-s2.0-S0577907322X0004X/1-s2.0-S0577907322001551/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjEI7%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJIMEYCIQCn7LYMDJoAcRO%2BnYyeencQrrpukSMGrofBPaCCnfs%2FgAIhAN0%2FI%2F4LQEQS5Wc2zgUJlD01hkh4JudK9E0IsgDr%2Bc1DKswECCcQBRoMMDU5MDAzNTQ2ODY1Igyywf%2F0Prai%2Fe40okkqqQTlLXsfTDY6bfiKk1YimIIv9xDrEK9zCddliu74jn1w3bfSvT9Yz7x%2FyzSfYveMjTTVLnmcxR0HJhaziziDk5MSnHEO%2BgGhocPpgUX7Yf3fiX8UUXiqcypdVKZt2DpH%2BcC07V8pvIVshuWt%2Bw81vGwW1IwpQv8kh1hnhHC%2FRAZnI6Q3wfgXgHFWGeXCfPdAednwj3iuCNLBem8pjBc8Sys4CCn1XQ8AOdXIZ8ButZsl%2FREwTbGArMSgQfFjA9C81Si5rCneIAHlss53f3FdZzqb20L1%2BBHgdlOiuLTK%2B%2FghVeWCC%2BKbuXZgCKosDpVf9f4z2jqW%2F7qClwg36eCE6%2F9AUK2fFPyfA%2FbzRFMJzBx7aA2w4uqWnSQmnEvYdayl40gAIcZwnoYSOOdUrsgxfPm41IPU95MGTp8gWzmVbGLG0SxwnuQ9ARp7zwJ3L%2BGYR3U1Mwu5ajuVMIJ4P9giJ%2BXmuC5QwwHoyX1Um1I7SN75BhdGREVQQVCgEt%2BxYWXHvbf9SJV2vyhvg6ouAtEA7lMFnXYter%2Fy4qRrC5NP6FRCz40CBYof4pG%2B7chrqO0o6GLsMRdOZvasYB7DbPpuTFiDD84uFmfOwFchA2wrWrEtYUmGHUW9T6nAsLzEehjSmPg8XV7gZ15Hby7kKOzUwVuhwPOMSvwRBx5%2BJhIjUvO19kvuSIbewa37GsCVsdxmxhjs8vk4wA9VCsjOsnLAGELa5W1CTB1FXiLZMI3fsZ8GOqgBW21L9Ds62uup3M3TtDK0OnekdfKZp1E1TPGCoyTaWNL0rcXb6CHiXhGx8JE8n%2BNz5bhLn9eJMVsSL4BEWIfkEDp7OAlAapTSEvLotuXTXuXIwqfLByKgPs%2FSXHFsArbo5w12DPTTDbfk9G0nKsBjNAlbX0mkySJpDAXvPb5ZgK8KDtFUXGW5p9tUahtmqCNmengMZrNA5bALqYdpZsoxClmbcgt%2Brd%2Fy&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20230215T063712Z&X-Amz-SignedHeaders=host&X-Amz-Expires=300&X-Amz-Credential=ASIAQ3PHCVTY2YA3Y4J2%2F20230215%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=0643597d54ab427ba27c2f184c1ddbc6970ae3cced449ff73100e45369c5df27&hash=b2d729c9f6f9180e5b894a0462f13a511255a244cfa8f110018611b72f980246&host=68042c943591013ac2b2430a89b270f6af2c76d8dfd086a07176afe7c76c2c61&pii=S0577907322001551&tid=spdf-035bf05a-f031-4028-869e-0ac0f74edc9f&sid=e732549c1d5d034c6c581f382ea1197c2d22gxrqb&type=client&tsoh=d3d3LnNjaWVuY2VkaXJlY3QuY29t&ua=031c585f570d5f5d5d&rr=799c08960c78168f&cc=my

The unsteady stagnation point flow of hybrid nanofluid past an impermeable disk is investigated with the presence of thermal radiation. The pair of aluminium oxide and copper with 2% of ϕhnf are numerically analyzed using the existing correlations of hybrid nanofluid. The governing model is simplified into a set of differential (similarity) equations and then, numerically solved by employing the bvp4c solver in the Matlab software. The dual solutions are presented while the stability analysis certifies the physical/real solution. The availability of dual solutions is detected when the range of control parameters are −1.5≤B≤−1 (unsteadiness decelerating parameter), 0≤R≤0.1 (radiation parameter) and λc≤λ≤0.5 (velocity ratio parameter). The accession of radiation parameter and the use of different nanofluids (Cu-H2O, Al2O3-H2O and Cu-Al2O3/H2O) are not prolonging the boundary layer separation. However, the addition of R, B and the use of Cu-Al2O3/H2O hybrid nanofluid enhance the thermal performance of the working fluid.