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Radiative MHD flow of Rivlin–Ericksen nanofluid of grade three through porous medium with uniform heat source
BeniSuef University Journal of Basic and Applied Sciences volume 11, Article number: 81 (2022)
Abstract
Background
The paper investigates the analytical and numerical solution of the radiation effect on MHD flow of Rivlin–Ericksen nanofluid of grade three through a porous medium with a uniform heat source between two vertical flat plates. The governing equations are solved analytically using multistep differential transform method (MDTM) and numerically using finite difference method (FDM) and shooting method by designing MATLAB and Mathematica algorithms. The study discovered that the MDTM, FDM, and shooting methods are effective for solving nonlinear differential equations like this one.
Results
Graphs and tables show the influence of different parameters on velocity and temperature. Figures and tables show the comparisons between current outcomes and previous results that are accessible.
Conclusions
The present results showed that the analytical and numerical solutions agree well with previously published outcomes.
Background
The analysis of heat transfer characteristics of various fluid flows can be extremely useful in improving the performance of industrial systems. Natural convection can highly be significant, especially when moving fluid is minimally influenced by forced convection heat transfer. Natural convection has piqued the interest of scientists since it occurs in a variety of technical applications. Geothermal systems, heat exchangers, chemical catalytic reactors, fiber and granular insulation, packed beds, petroleum reservoirs, and nuclear waste dumps all use natural convection to transfer heat [1,2,3]. Mixed convection of Cu–water nanofluid inside a twosided liddriven cavity filled with heterogeneous porous media is optimized. The horizontal walls are adiabatic and movable, and the vertical walls are exposed to constant hot and cold temperatures. Twophase mixture model and Darcy–Brinkman–Forchheimer relation are implemented, respectively, for the simulation of nanofluid and fluid flow through porous media [4,5,6]. In the recent decade, various researchers investigated exergy analyses and entropy generation to provide the best geometry of the heat exchanger. Using nanofluid and swirl flow devices are passive techniques for improving thermal efficiency. Exergy variations for forced convection of nanofluid through a pipe equipped with twisted tape turbulators have been simulated via finite volume method [7, 8].
The study of blood flow through a stenosed artery is very important because of the fact that the cause and development of many cardiovascular diseases are related to the nature of blood movement and the mechanical behavior of the blood vessel walls. Stenosis is defined as a partial occlusion of the blood vessels due to the accumulation of cholesterol, fats, and the abnormal growth of tissue. Cardiac catheterization (also called heart catheterization) is a diagnostic procedure that does a comprehensive examination to determine how the heart and its blood vessels function. One or more catheter is inserted through a peripheral blood vessel in the arm (antecubital artery or vein) or leg (femoral artery or vein) with Xray guidance. This procedure gathers information such as adequacy of blood supply through the coronary arteries, blood pressure, blood flow throughout chambers of the heart, collection of blood samples, and Xrays of the heart’s ventricles or arteries [9, 10].
Analysis of natural convection is often difficult, particularly when a nonNewtonian fluid is flowing in a system. Various flows of Newtonian and nonNewtonian fluids bounded by two infinite parallel vertical plates have been studied analytically, numerically, and experimentally by numerous scholars. A numerical solution is investigated for Rivlin–Ericksen fluid natural convection flow and heat transfer between parallel plates. Nowadays, much attention is being paid to the application of nanofluids for cooling purposes [11,12,13].
Nanoparticles can significantly improve the thermal conductivity of base fluids by altering their thermophysical properties, resulting in improved heat transfer [14,15,16,17]. Chamkha [18], using continuum equations, constructed a mathematical model for a continuous twophase nonNewtonian fluid flow over an infinite porous flat plate. Ellahi et al. [19] used series solutions to investigate the heat transfer features of a fully developed incompressible nonNewtonian fluid flow in coaxial cylinders using Reynolds and Vogel models. Youssri et al. [20, 21] presented a numerical technique for solving one and twodimensional partial differential heat equation and the fractional Bagley–Torvik equation with homogeneous boundary conditions by employing the tau and collocation methods. The Runge–Kutta method was used to investigate the influence of free convection flow on nonNewtonian fluid flow through a porous media along with an isothermal vertical flat plate [22]. The natural convection of a nonNewtonian nanofluid flow between two infinite parallel vertical flat plates was investigated analytically using the differential transformation approach. Domairry et al. [23] discovered that as the volume percentage of nanoparticles grows, the thickness of the momentum boundary layer increases while the thickness of the thermal boundary layer drops.
Pittman et al. [24] examined the natural convection heat transfer of a nonNewtonian fluid moving over an electrically heated vertical plate under constant surface heat flux circumstances and found that the temperature difference grows as the distance between the fluid and the plate increases. Using analytical and numerical approaches, Hatami et al. [25] examined the natural convection of a nonNewtonian nanofluid flow between two vertical flat plates. The Boussinesq approach was utilized by Ternik et al. [26] to calculate the natural convection of nonNewtonian nanofluids in a square differentially heated chamber.
The aim of this work is to investigate analytical and numerical solutions of the radiation effect on MHD flow of Rivlin–Ericksen nanofluid of grade three through porous medium with uniform heat source between two vertical flat plates. In addition, the effects of dimensionless nonNewtonian viscosity, radiation, porosity parameter, Hartmann number, Eckert number, Prandtl number, and heat source parameter on the temperature and velocity of flow between two infinitely parallel vertical flat plates are investigated. The reduced ordinary differential equations are solved using MDTM, FDM, and shooting method. This approach provides highly accurate solution estimates in a series of steps. The variation distribution of velocity and temperature with the parameters that govern the problem is presented. Furthermore, graphical and numerical results for the velocity and temperature profiles are presented and discussed for various parametric conditions. Finally, comparisons with previously published works are made and showed that the present results have high accuracy and are found to be in good agreement.
Mathematical formulation of the problem
A schematic of the problem under study is shown in Fig. 1. It consists of two flat plates that can be positioned vertically. A nonNewtonian fluid is contained on two flat plates separated by 2b. At x = + b and x = b, the walls are kept at constant temperatures T_{1} and T_{2}, respectively, with T_{1} > T_{2}. The fluid near the wall is caused by the temperature difference, at x = − b to rise and at x = + b to fall [27]. The fluid is a waterbased nanofluid containing copper. The base fluid and the nanoparticles are considered to be in thermal equilibrium, with no slide between them. Table 1 lists the nanofluid’s thermophysical properties [28].
Radiative heat flux \(q_{{\text{r}}}\) can be calculated by using Rosseland approximation as follows [29, 30]:
where the Stephan–Boltzmann constant and the mean absorption coefficient, respectively, are represented by σ* and K*. The temperature differences in the flow are supposed to vary by the fourth power of T which can be expressed by a linear function of temperature. This can be implemented by expansion of \(T^{4}\) based on Taylor series as follows [29]:
By neglecting higherorder terms of temperature in Eq. (2) against the firstdegree term, the following expression is achieved [29]:
Subsequently, by substituting Eq. (3) into Eq. (1), radiative heat flux is rewritten as follows [29]:
The effective density \(\rho_{{{\text{nf}}}}\), the effective dynamic viscosity \(\mu_{{{\text{nf}}}}\), the heat capacitance \(\left( {\rho C_{p} } \right)_{{{\text{nf}}}}\), and the thermal conductivity \(\kappa_{{{\text{nf}}}}\) of the nanofluid can be expressed by the solid volume fraction \(\varphi\) as
The Navier–Stokes and energy equations can be constructed as follows under these assumptions and using the nanofluid model presented by Maxwell Garnett (MG) model [31]:
The equation of motion is [32 and 31]:
and the energy equation is as follows:
Rajagopal [27] has demonstrated that by using the similarity variables:
By substituting the above parameters, the Navier–Stokes equations and the energy equations can be reduced to two ordinary differential equations:
where A = \(\frac{{\sigma_{{{\text{nf}}}} }}{{\sigma_{f} }}\), B = \(\frac{{\kappa_{{{\text{nf}}}} }}{{\kappa_{f} }}\), \(\mu_{{{\text{nf}}}}\) = \(\frac{{\mu_{f} }}{{\left( {1  \varphi } \right)^{2.5} }}\), \(v_{o}\) = \(\frac{{\rho_{0} \gamma gb^{2} \left( { T_{1}  T_{2} } \right)}}{{\mu_{{{\text{nf}}}} }}\),\(\delta = \frac{{\beta_{3} u_{0}^{2} }}{{\mu_{f} b^{2} }}\) is the dimensionless nonNewtonian viscosity, \(P = { }\frac{{b^{2} }}{{k_{f} }}{ }\) is the porosity parameter, \({\text{Ha}}^{2} = \frac{{\sigma_{f} \beta_{0}^{2} b^{2} }}{{ \mu_{f} }}\) is the Hartmann number,\({ }R_{d} = { }\frac{{k k^{*} }}{{4 \sigma^{* } T_{\infty }^{3} }}\) is the radiation parameter, \({\text{Ec}} = \frac{{u_{0}^{2} }}{{c_{f } \left( {T_{1  } T_{2} } \right)}}\) is the Eckert number, \(\Pr = \frac{{\mu_{f } c_{f} }}{{k_{f} }}\) is the Prandtl number and \(\alpha = { }\frac{{Q_{0} { }b^{2} }}{{k_{f} }}{ }\) is the heat source parameter.
The following are the appropriate boundary conditions:
Methods
Analytical method
When DTM is used for solving differential equations with the boundary conditions at infinity or problems that have highly nonlinear behavior, the outcomes were diverse solutions. Furthermore, power series are ineffective when the independent variable has large values. To address this problem, MDTM has been used for the analytical solution of differential equations, and it is discussed in this section. For this, the following nonlinear initial value problem is considered.
By applying differential transformation theorems on Eqs. (13) and (14), the following recursive relations can be obtained:
where V (k) and Θ (k) are the differential transforms of u (\(\eta\)) and θ (\(\eta\)).
The boundary condition’s (15–16) differential transform is as follows:
We can consider the following boundary conditions (15–16):
Then, differential transforms of (21–22) are given by
Moreover, by substituting Eqs. (23) and (24) into Eqs. (17) and (18) and by the recursive method, we can calculate other values of V (k) and Θ (K) with the aid of Mathematica 12.3 algorithms.
Finite difference method
The system of coupled nonlinear ordinary differential Eqs. (13–14) with boundary conditions (15–16) is solved for the flow velocity and temperature using FDM by designing MATLAB and Mathematica programs and then the present graphics are drawn by designing the Excel program. The following linearized form should be applied because of nonlinearity in this system:
where bar notation denotes the iterated terms that convert Eqs. (13–14) to a linearized one.
By applying Taylor’s expansions of the dependent variables about central point for Eqs. (25–26), a system of algebraic equations [33] is obtained:
where i = 1, 2, 3,…, m + 1 and m is the number of subintervals of the finite domain of solution (− 1 < \(\eta { }\) < 1).
Shooting method
Numerical solutions of the ordinary differential Eqs. (13–14) subject to Neumann boundary conditions (15) and (16) are obtained using classical Runge–Kutta method with shooting techniques and MATLAB package (ode45). The set of coupled nonlinear ordinary differential equations along with boundary conditions have been reduced to a system of simultaneous equations of the first order for the unknowns following the method of superposition in Na [34].
Equations (13)–(14) can be written as follows:
where \(z_{1}\) = \(v\) and \(z_{3}\) = \(\theta\).
where \(i_{1}\) and \(i_{2}\) are a priori unknowns that must be resolved as part of the solution.
Ode45 integrates the system of differential Eqs. (30–33) with suitable guess values for initial conditions \(i_{1}\) and \(i_{2}\). The calculated values of the velocity and temperature profiles are compared with the given boundary conditions.
Results
Discussion
In this paper, MDTM, FDM, and shooting method are applied successfully to find the solution of the radiation effect on MHD flow of Rivlin–Ericksen nanofluid of grade three through porous medium with uniform heat source between two vertical flat plates. Tables and graphical representation of the results are very useful to demonstrate the efficiency and accuracy of MDTM, FDM, and shooting method for the problem stated in this work. In order to ensure that the current results are accurate, we compared these results with the previously published work. The graphs (2–9) (a) and (b) show the effects of φ, δ, P, Ha, R_{d}, Ec, Pr, and α on V (η) and θ (η) profiles. Figures 2, 3, 4, and 5a show that an increase in φ, α, Ec, and Pr parameters leads to an increase in V (η), but Figs. 6, 7, 8, and 9a present that an increase in δ, R_{d}, Ha, and P parameters leads to a decrease in V (η). In addition, Figs. 2, 3, 4, and 5b show that an increase in φ, α, Ec, and Pr parameters leads to an increase in θ (η), but Figs. 6, 7, 8, and 9b present that an increase in δ, R_{d}, Ha, and P parameters leads to a decrease in θ (η). It can also be observed that P and Ha on θ (η) are very little, almost nonexistent (Figs. 8 and 9b).
In addition, Tables 2 and 3 show comparison between MDTM, FDM, and shooting method with GM, LSM, and CM [32]. As can be seen, this approximate analytical and numerical solution is in good agreement with the relevant solutions.
Moreover, Tables 4, 5, 6, and 7 (Nu and HPM [35]) demonstrate a comparison between MDTM, FDM, and shooting technique. This approximate analytical and numerical solution agrees well with the pertinent solutions, as can be seen.
Conclusions
In this paper, the radiation effect on MHD flow of Rivlin–Ericksen nanofluid of grade three through porous medium with uniform heat source between two vertical flat plates is studied analytically by MDTM and numerically by FDM and shooting method. Results in graphs and tables for the velocity and temperature profiles are presented and discussed for various parameters φ, δ, P, Ha, R_{d}, Ec, Pr, and α. Moreover, the results indicate the restraining effects of various parameters on velocity and temperature. Furthermore, comparisons with previously published works are made and showed that the present results have high accuracy and are found to be in good agreement. In particular, results for different parameters are summarized in the next two paragraphs.

It has been found that the parameters φ, α, Ec, and Pr vary directly with velocity v (η) and temperature θ (η).

It has been displayed that the parameters δ, P, Ha, and R_{d} vary inversely with velocity v (η) and temperature θ (η).
Availability of data and materials
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Abbreviations
 2b :

Distance between the plates
 g :

Gravity
 T :

Temperature
 T _{1}, T _{2} :

Temperatures at left and right plates, respectively
 \(T_{{\text{m}}}\) :

Mean temperature
 \(\beta _{3}\) :

Rheological material constant
 \(q_{{\text{r}}}\) :

Radiative heat flux
 σ*:

Stephan–Boltzmann constant
 K*:

Mean absorption coefficient
 \(\rho _{{{\text{nf}}}}\) :

Effective density
 \(\mu _{{{\text{nf}}}}\) :

Effective dynamic viscosity
 \((\rho C_{p} )_{{{\text{nf}}}}\) :

Heat capacitance
 \(\kappa _{{{\text{nf}}}}\) :

Thermal conductivity
 \(\varphi\) :

Solid volume fraction of the nanoparticles
 \(u\) :

Velocity of fluid
 \(\eta\) :

Dimensionless variable
 \(v\) :

Dimensionless velocity
 \(\theta\) :

Dimensionless temperature
 \({\text{Ec}}\) :

Eckert number
 \(\Pr\) :

Prandtl number
 \(\alpha\) :

Heat source parameter
 \(P\) :

Porosity parameter
 \({\text{Ha}}^{2}\) :

Hartmann number
 \(R_{d}\) :

Radiation parameter
 \(\delta\) :

Dimensionless nonNewtonian viscosity
 MDTM:

Multistep differential transform method
 FDM:

Finite difference method
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Soliman, H.A.A. Radiative MHD flow of Rivlin–Ericksen nanofluid of grade three through porous medium with uniform heat source. BeniSuef Univ J Basic Appl Sci 11, 81 (2022). https://doi.org/10.1186/s43088022002619
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DOI: https://doi.org/10.1186/s43088022002619
Keywords
 Rivlin–Ericksen nanofluid
 Radiation
 Magnetic field
 Porous medium
 Heat source
 Analytical and numerical solutions