Research Article Thin Film Flow of Tangent Hyperbolic Fluid with Nonlinear Mixed Convection Flow and Entropy Generation Wubshet Ibrahim and Tezera Gizewu Department of Mathematics, Ambo University, Ambo, Ethiopia Correspondence should be addressed to Wubshet Ibrahim; wubshetib@yahoo.com Received 5 June 2021; Revised 18 July 2021; Accepted 8 September 2021; Published 26 September 2021 Academic Editor: Babak Shotorban Copyright © 2021 Wubshet Ibrahim and Tezera Gizewu. is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. is paper examined the three-dimensional steady thin ﬁlm ﬂow of tangent hyperbolic ﬂuid with nonlinear mixed convection ﬂow and entropy generation past a stretching surface under the inﬂuence of magnetic ﬁeld. For the ﬂow problem, the Cattaneo– Christov heat and mass diﬀusion model was employed to examine heat and mass transfer characteristics and impacts of the normally directed magnetic ﬁeld. To transform nonlinear PDEs into ODEs, the variable transformation technique was used. e bvp4c algorithm was implemented to solve these ODEs. e behavior of every leading parameter on the velocities, temperature, concentration proﬁle, entropy generation, and Bejan number was reported with tabular and ﬁgurative form. e results show that as the values of Br increase, the entropy generation enhances, but the Bejan number decreases. Moreover, as the values of B increase, the opposite characteristics are observed in entropy generation and Bejan number graphs. Furthermore, the skin friction coeﬃcient number, local Nusselt number, and Sherwood number are graphically discussed for the active involved parameters. e best agreement is recorded when we compare this paper with the previous literature for various values of M. 1. Introduction In physical sciences, one of the essential factors of ﬂow of ﬂuid which has very common applications is entropy gen- eration. In diﬀerent ﬁelds of sciences and technologies, some researchers have done a lot of work on it. In case of thin ﬁlm ﬂuid ﬂow, very little work is available in the literature. e entropy productions due to transmission of convective heating were reported by Bejan [1, 2] for the ﬁrst time. Later on, Lin et al. [3] examined the compressible ﬂow through a high pressure turbine for local entropy generation due to delayed detached eddy simulation. Further, Khan et al. [4] studied entropy generation of rotating disks due to bio- convection ﬂow of nanoﬂuid. Opanuga et al. [5] have also carried out a study on entropy generation analysis with the eﬀect of ion-slip and hall current of couple stress ﬂuid. Moreover, Bibi and Xu [6] have discussed entropy gener- ation analysis of Jeﬀrey nanoﬂuid under magnetic ﬁeld eﬀect on horizontal channel. e study of entropy generation analysis nowadays is an active research area. Accordingly, Ji et al. [7] have presented performance evaluation of entropy generation due to forced convective heat transfer. Shit et al. [8] also investigated entropy generation performance under the eﬀect of thermal radiation and unsteady ﬂow over a ﬂat plate. Gireesha et al. [9] have presented a study on entropy generation with in- clined porous microchannel for Casson ﬂuid ﬂow with viscous and Joule heating. Muhammad and Sohail [10] have computed entropy generation under the impact of radiative heat transfer on rotating disks with Ree–Eyring ﬂuid. Leonid and Martyushev [11] have analyzed the misconception about the production of entropies. A report on nonequilibrium thermodynamics with productions of entropy has been presentedbyVelascoetal.[12].Gallavotti[13]hascomputed stationary states of nonequilibrium in a point of view. Additionally, Kurnia et al. [14] have studied the cooling of microchannel with heat transfer performance on entropy production, and S ¸ahin [15] has numerically explored en- tropy generation in a square cavity ﬁlled with boron-water nanoﬂuid. Moreover, Soltanipour et al. [16] have numeri- cally examined ferroﬂuid forced convection with magnetic ﬁeld and entropy generation in a curved pipe. Additionally, Hindawi Mathematical Problems in Engineering Volume 2021, Article ID 4836434, 16 pages https://doi.org/10.1155/2021/4836434