Journal: |
Numerical Heat Transfer, Part A: Applications
Taylor & Francis
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Volume: |
8
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Abstract: |
This article presents a computational study for the peristaltic pumping
within vertical irregular divergence channels filled with magnetic six-constant
Jeffrey nanofluids. Various configurations of the outer boundaries are
considered, namely, square wave, trapezoidal wave, multisinusoidal wave,
and triangular wave. An induced magnetic field together with nanoparticles
and mass concentration are considered. Influences of the Dufour and
Soret numbers are examined, and the cases of long wavelength and low
Reynolds number are applied. All the computations are obtained numerically
via MATHEMATICA symbolical software (built-in command ND-Solve),
and the obtained results are presented in terms of the axial velocity u, current
density Jz, the function of magnetic force U, axially induced magnetic
field hx, nanoparticle fraction profile X, concentration profile c, temperature
profile h, extra stress tensor Sxy, pressure gradient dp
dx , pressure rise
Dpk, and stream function w: The major outcomes revealed that the square
wave shape gives higher pressure gradients near the inlet and outlet parts
while the multisinusoidal wave gives periodic behaviors of dp
dx : Also, higher
axial-induced magnetic fields are given at the higher values of the magnetic
Reynolds number.
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