Abstract
This novel investigation suggests the implementation of famous numerical technique namely Galerkin finite element technique for peristaltic study of non-Newtonian fluid confined by a porous tube. The rheological consequences for non-Newtonian materials are executed by using micropolar fluid. The problem is modeled in form of Navier–Stokes expressions. The flow simulations are carried by utilizing the impact of the magnetic field and uniform porous medium. Additionally, the role of inertial forces is also observed as a novelty for current analysis. Unlike typical investigations, the presumptions of lubrication theory are not implemented in the modeling which allows the participation of inertial forces in the governing equations and provided the results independent of wavelength. The solution of the modeled set of coupled non-linear partial differential equations is obtained by Galerkin finite element method with quadratic triangular elements. The verification of attained numerical results with available literature for low Reynolds number approximation is also presented and found in excellent agreement. It is observed that the peristaltic mixing enhances with increasing the inertial and Lorentz force while reverse observations are noticed with for the dense porous medium. An increase in pressure rise per wavelength is observed for micropolar fluid as compared to that of viscous fluid. It is further claimed that the peristaltic mixing is improved with increasing the Reynolds number and permeability of porous medium.
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Abbreviations
- \({\varvec{A}}\) :
-
Unknown nodal vector
- \(a\) :
-
Half width of the channel
- \(b\) :
-
Wave amplitude
- \({B}_{0}\) :
-
Magnetic field parameter
- \(c\) :
-
Velocity of wave train lab frame
- \(D\) :
-
Modified Laplacian
- \({E}_{0}\) :
-
Electric field
- \({\varvec{F}}\) :
-
Global forcing vector
- \({{\varvec{g}}}^{\boldsymbol{*}}\) :
-
Microrotation vector
- \(H\) :
-
Wave in lab frame
- \(h\) :
-
Wave in wave frame
- \({J}^{*}\) :
-
Microgyration parameter in dimensional form
- \(J\) :
-
Microgyration parameter in non-dimensional form
- \(k\) :
-
Permeability of porous medium in dimensional form
- \(K\) :
-
Permeability of porous medium in non-dimensional form
- \({\varvec{K}}\) :
-
Global stiffness matrix
- \(M\) :
-
Hartmann Number
- \(m\) :
-
Micropolar parameter
- \(N\) :
-
Coupling parameter
- \({N}_{k}\) :
-
Interpolation shape function
- \(n\) :
-
Behavior index
- \(P\) :
-
Pressure in lab frame
- \({p}_{y}\) :
-
Yield stress
- \(p\) :
-
Dimensionless pressure in wave frame
- \({p}^{*}\) :
-
Dimensional pressure in wave frame
- \({\Delta P}_{\lambda }\) :
-
Pressure rise per wavelength
- \(Q\) :
-
Time mean flow rate in non-dimensional form
- \(q\) :
-
Flow rate in non-dimensional form
- \({Q}^{*}\) :
-
Time mean flow rate in dimensional form
- \({q}^{*}\) :
-
Flow rate in dimensional form
- \(Re\) :
-
Reynolds number
- \({R}_{m}\) :
-
Magnetic Reynolds number
- \(r\) :
-
Non-dimensional radial component in wave frame
- \(R\) :
-
Axial component in fixed frame
- \({r}^{*}\) :
-
Dimensional radial coordinate in wave frame
- \(t\) :
-
Time dependent variable
- \({u}_{i}\) :
-
Nodal variable
- \(\tilde{u }\) :
-
Approximate nodal variable
- \({u}^{*},{v}^{*}\) :
-
Velocity components in x* & y* direction in wave frame
- \(U, V\) :
-
Velocity components in X & Y direction in lab frame
- V :
-
Velocity vector
- \(u, v\) :
-
Dimensionless velocity components
- \({W}_{i}\) :
-
Weight function
- \({w}_{1},{w}_{2}\) , \({w}_{3}\) :
-
Weight functions
- \(z\) :
-
Non-dimensional axial component in wave frame
- \(Z\) :
-
Axial component in fixed frame
- \({z}^{*}\) :
-
Dimensional axial coordinate in wave frame
- \(\alpha \) :
-
Wave Number
- \(\overline{\alpha }, \overline{\beta },\overline{\gamma }\) :
-
Coefficients of spin gradient viscosity for micropolar fluids
- \(\epsilon \) :
-
Residual error
- \({\varepsilon }_{\psi }\) :
-
Error in approximate stream function
- \({\varepsilon }_{\omega }\) :
-
Error in approximate vorticity function
- \({\varepsilon }_{g}\) :
-
Error in approximate microgyration function
- \(\Omega \) :
-
Domain of the area integral
- \({\kappa }^{*}\) :
-
Thermal conductivity
- \(\overline{\kappa }\) :
-
Coefficient of vortex viscosity
- \(\kappa \) :
-
Consistency index
- \(\mu \) :
-
Dynamic viscosity
- \(\rho \) :
-
Density
- \(\Gamma \) :
-
Domain of the line integral
- \(\eta \) :
-
Dimensionless wave in wave frame
- \({\eta }^{*}\) :
-
Dimensional wave in wave frame
- \(\lambda \) :
-
Wave length in lab frame
- \(\phi \) :
-
Amplitude ratio
- \(\psi \) :
-
Stream function in non-dimensional form
- \({\psi }^{*}\) :
-
Stream function in dimensional form
- \({\psi }_{k}\) :
-
Element nodal approximation of stream function
- \(\omega \) :
-
Non-dimensional vorticity
- \({\omega }_{k}\) :
-
Element nodal approximation of vorticity function
- \(\sigma \) :
-
Electrical conductivity
- \(\nu \) :
-
Kinematic viscosity
- \((ele)\) :
-
Restriction to the relevant variable/function to the element
- \(k\) :
-
Index of the node
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Acknowledgements
The authors extend their appreciation to the Deanship of Scientific Research at King Khalid University, Abha 61413, Saudi Arabia for funding this work through research groups program under grant number R.G.P-1/234/42.
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Tong, ZW., Ahmed, B., Al-Khaled, K. et al. Peristaltic Blood Transport in Non-Newtonian Fluid Confined by Porous Soaked Tube: A Numerical Study Through Galerkin Finite Element Technique. Arab J Sci Eng 47, 1019–1031 (2022). https://doi.org/10.1007/s13369-021-05981-1
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DOI: https://doi.org/10.1007/s13369-021-05981-1