Combined septum and chamfer fins on threaded stretching surface under the influence of nanofluid and the magnetic parameters for rotary seals in computer hardware

In this paper, variation of temperature and velocity in the x-direction and the angular
velocity of the nanofluids flow through triangular and rectangular and chamfer fins are investigated
in the existence of a uniform magnetic field. The innovation of this paper is to investigate
parameters of Mwcnt and TiO2 nanofluids passing from the different fins and blades on the
stretching surface and compare their results together. Also by using FlexPDE and Design software,
we were able to show all temperature and angular velocity counters in the form of diagrams and 3D
images. The finite Element Method is selected for solving governing equations. The second part of
the description relates to the use RSM method in the Design-Expert software. In this paper by using
the RSM method, optimized the nanofluid velocity and heat transfer passing from the stretching
sheet. Based on the results obtained from the angular velocity graphs and the heat transfer cantors
in the Design-Expert software, the best optimization occurred for nanofluid velocity and nanofluid
temperature, and angular velocity with u = 1.19 and T = 21.15 and N = 117.28. By comparison
between the passing of MWCNT and TiO2 nanofluids flow on the different fins and blades, the
results show that the temperature of MWCNT nanofluid around the fins has a greater value than
the TiO2 nanofluids. The maximum heat transfer and temperature occurs near the rectangular fins
for TiO2, and is 0.14% bigger than triangular and chamfer fins.