ORIGINAL RESEARCH article

Front. Energy Res., 06 October 2022

Sec. Process and Energy Systems Engineering

Volume 10 - 2022 | https://doi.org/10.3389/fenrg.2022.1007159

Dynamics of MHD second-grade nanofluid flow with activation energy across a curved stretching surface

    SC

    Srinivas C. Reddy 1

    KK

    Kanayo Kenneth Asogwa 2*

    MF

    Mansour F. Yassen 3,4

    AD

    Adnan 5

    ZI

    Zahoor Iqbal 6

    SM

    Sayed M-Eldin 7

    BA

    Bagh Ali 8

    SK

    Swarnalatha KM 1

  • 1. Department of Mathematics, Govt. City College, Hyderabad, Telangana, India

  • 2. Department of Mathematics, Nigeria Maritime University, Okerenkoko, Delta State, Nigeria

  • 3. Department of Mathematics, College of Science and Humanities in Al-Aflaj, Prince Sattam Bin Abdulaziz University, Al-Aflaj, Saudi Arabia

  • 4. Department of Mathematics, Faculty of Science, Damietta University, New Damietta, Damietta, Egypt

  • 5. Department of Mathematics, Mohi-ud-Din Islamic University, Nerian Sharif, AJ&K, Pakistan

  • 6. Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan

  • 7. Center of Research, Faculty of Engineering, Future University in Egypt, New Cairo, Egypt

  • 8. Faculty of Computer Science and Information Technology, Superior University, Lahore, Pakistan

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Abstract

This analysis addresses the influence of activation energy on the MHD flow of second-grade nanoliquid over a convectively heated curved stretched surface. The impact of heat generation/absorption, thermophoresis, and Brownian motion are also incorporated. This current study in addendum reveals the solution narrating the nanofluid flow behaviour of the stretched curve to better the performance of the system. Hence, the mathematical construction of governing partial differential equations (PDEs) is transmitted into nonlinear ODEs by employing appropriate transformations. The attained ODEs are conducted numerically via ND-Solve. It is consequential to report that fluid velocity and temperature fields significantly rise with concurrent enhancing values of the fluid parameter and curvature parameter. Moreover, the concentration field enhances considering the energy activation variable and suppresses with the reaction rate constant while thermophoresis escalates the temperature distribution as the Nusselt number lowers with a stronger internal heat source parameter Q.

Introduction

In recent advancements, nanofluids have obtained immense attention due to their notable thermal transfer and fascinating applications in numerous fields such as computer processes, hybrid power, fuel cell, and other high-energy devices. The fluids are prepared by suspending nanoparticles in base fluids. The size of nanoparticles ≤ 100 nm. The prime idea of nanofluid was coined by Choi and Eastman (1995). Later, Buongiorono (2006) suggested the two main characteristics, namely, Brownian movement and thermophoretic force, to enhance the ability of the ordinary fluid. He found that enhancing the Nusselt number leads to a rise in the nanoparticle volume fraction. Sheikholeslami et al. (2014) discussed the impact of MHD copper nanofluid flow. The theoretical investigation of Al2O3 water nano liquid was examined by Malvandi et al. (2015). They discovered that the enforced heat irregularity alters the path of nanoparticle movement and modifies the patterns of the fields. Mahanthesh et al. (2016) reported the squeezing effect of nanofluids which escalates the thermal layer and leads to a depreciation of the rate of heat transport. Ibáñez et al. (2016) explored the MHD nanoliquid flow in a porous channel with a radiation effect. Eid et al. (2017) considered gold nanoparticles in the flow of Sisko nanofluid and revealed that radiation production boosts thermal transport. The Burgers flow of nanofluid with the effect of Cattaneo–Christov was examined by Hayat et al. (2017a). Also, Hayat et al. (2017b) swotted numerically the flow of nanoliquid over a revolving disk in the presence of the slip effect. Zuhra et al. (2018) considered MHD second-grade nanoliquid comprising gyrotactic microorganisms. They concluded that microorganism density leads to increases with momentum slip. The MHD Carreau nanoliquid over a permeable stretching sheet was considered by Khan and Shehzad (2020). Reddy et al. (2019) analyzed the MHD nanoliquid via a stretching sheet. Shah et al. (2021) considered numerical computation of entropy production of nanoliquid due to a porous surface. Khan et al. (2020) thrashed out the consequences of entropy minimization of Casson nanofluid over a rotating cylinder.

The exploration of non-Newtonian fluid has inspired scholars due to its several applications, such as the production of plastic, food processing, and exclusion of tumors. In this current investigation is a subcategory of non-Newtonian fluid termed second-grade fluid. This model takes into consideration the consequences of normal stress in flow conditions, as well as shear thinning and thickening. Tan and Masuoka (2005) described the flow of nanofluid with variable thermal conductivity for the second grade. Rashidi and Majid (2010) analyzed the time-dependent squeezing flow for second-grade fluid. The thermal and species transport analysis of second-grade fluid over a surface with heat flux was deliberated by Das et al. (2016). Jamil et al. (2011) reported the helical flow of second-grade fluid over coaxial cylinders. Turkyilmazoglu (2012) analytically examined the flow of second-grade non-Newtonian fluid with mass transfer over a shrinking sheet. Khan and Pop (2010), Makinde and Aziz (2011), and Hsiao (2010) evaluated the magnetohydrodynamic flow of liquid of second grade with electromagnetic dispersion and non-uniform heat source/sink. Akinbobola and Okoya (2015) swotted second-grade fluid with heat generation. The exact solution of a second-grade fluid via co-axial cylinders was reported by Erdogan and Imrak (2008). Nadeem et al. (2012) explored second-grade fluid over a horizontal cylinder.

Magnetohydrodynamics (MHD) flow has gained the interest of scholars due to its remarkable applications in the industry and engineering. As contained in the structure of the MHD generator, the cooling system is filled with fluids metal, the deposit of energy, pumps, and flow meters. Theoretically, the magnetic fields can persuade a drag identified as Lorentz force in a moving liquid, which depreciates the fluid velocity. Thus, boosting the fluid temperature and concentration. Numerous researchers have analyzed the impact of magnetic parameters, specifically in the boundary layer problem. The impact of magnetic field flow on permeable surfaces with slip conditions was elaborated by Hayat et al. (2011). Makinde et al. (2013) delineated the influence of MHD on nanoliquid with buoyancy effect. The flow of nanoliquid through two-phase models was visualized by Sheikholeslami et al. (2015). Hayat et al. (2016) addressed the influence of second-grade nanofluid. MHD flows over radially shrinking/stretching disks were reported by Soid et al. (2018). Hayat et al. (2015) considered the 3D flow of MHD nanoliquid. Sharif et al. (2019) elucidated MHD nanoliquid via an exponential sheet. Shah et al. (2020) conducted water base nanoparticles consisting of SWCNT and MWCNT over a vertical cone. Shoaib et al. (2020) evaluated numerically MHD hybrid nanoliquid with thermal radiation. They found that thermal transport rate enhances with growing values of magnetic effect and biot number. Recently, Alamri et al. (2019) discussed the second-grade fluid in the presence of Fourier’s heat flux theory.

Activation energy (AE) is the minimal amount of energy needed for a reaction to occur. The activation energy required to transfer energized particles or macromolecules to a location where they would undergo physical transit can be overestimated. The notion of activation energy is commonly useful in thermal engineering. The Bestman (Bestman, 1990) was initially coined with the activation energy of a binary amalgam phenomenon in a porous space. The unsteady natural convective flow was reported by Makinde et al. (2011) with AE. The influences of activation energy on a magnetic nanofluid were investigated by Hamid et al. (2018). Mustafa et al. (2017) and Dhlamini et al. (2022) elaborated on the behaviour of magneto nanoliquid with activation energy. Dawar et al. (2020) conducted a magnetic field flow of nanoliquid with activation energy. Hayat et al. (2022) addressed the effect of AE on the MHD flow of third-grade nanofluid over convective condition. The 3D flow of Casson nanoliquid for the thermal radiative flow with AE was examined by Khan et al. (2019). Hayat et al. (2018) inspected the 3D flow of Darcy–Forchheimer rotating AE. The 3D time-dependent flow of Carreau nanofluid on chemical reaction and AE was explored by Irfan et al. (2019). Other materials that have added value to this work are in the studies by Asogwa et al. (2013); Khan et al. (2017); Ali et al. (2020); Bilal et al. (2021); Jayaprakash et al. (2021); Ali et al. (2022a); Adnan et al. (2022); AdnanAshraf, (2022); AdnanAshraf et al. (2022); AdnanMurtaza et al. (2022); Asogwa et al. (2022); Ali et al. (2022b); Goud et al. (2022); and Weera et al. (2022).

Considering the overview of the abovementioned work, the prime focus of the current analysis is to scrutinize the impact of Arrhenius activation energy on the MHD flow of second-grade nanofluid toward a curved stretched surface. By employing the transformation procedure, PDEs have been transmuted into ODEs, which are then established numerically by ND-Solve using Mathematica. Our obtained physical parameters are prescribed through tables and graphs.

Modeled equation

The second-grade fluid Cauchy stress tensor is given by Mabood and Das (2016).Where,,, ,, are the identity tensor, dynamic viscosity, first and second Rivilin Erickson tensor, and material constant.

Mathematical formulation

We consider the 2D flow of MHD second-grade nanoliquid flow due to the curved stretched surface. Featuring AE, chemical reaction (binary), and heat generation. We consider (r,s) to be the curvilinear coordinates (see Figure 1). The stretched sheet in s path with and r is considered orthogonal to s. Then, B0 is applied along the transverse path of flow from the magnetic field. Assuming that the moderate magnetic field in the form of generated is ignored, a nanostructured materials framework is utilized for erratic motion and thermophoresis. Under the aforementioned assumptions, equations (Mabood and Das, 2016; Imtiaz et al., 2019) are written for the boundary layer as follows:With associated BCs (Mabood and Das, 2016) – (Imtiaz et al., 2019)

FIGURE 1

FIGURE 1

Geometry of the problem.

Transformation consideration

Eq. 3

is satisfied, and with the help of the abovemrntioned transformation

Eqs 1

5

are reduced

with transformed BCs

  • We have, , , Nb =, , ,

  • Sc = , E =, , , Pr = , .

Now, removing the between Eqs 8 and 9, we get

Expressions for the local Cfs and Nus gives

Non-dimensional Nusselt number and friction co-efficientwhere

Results and discussion

The key emphasis of this article is highlighted via the numerical approach integrated by utilizing the NDSolve technique by using Mathematica. The main emphasis of pertained physical variables on, , and fields, as well as drag fraction and Nusselt number, are elaborated and delineated through Figures 220 and Tables 13. Table 1 is adorned to check the compatibility of the current analysis by constructing a contrasting . An excellent achievement has been found with a previously published result. 8. The reference values in the current study have been taken as , , Q = 0.1, M = 1, E = 1, and kept constant throughout the computation, and the variations have been mentioned in the graphs and tables accordingly.

FIGURE 2

FIGURE 2

Disparity of M on .

FIGURE 3

FIGURE 3

Disparity of M on .

FIGURE 4

FIGURE 4

Disparity of M on .

FIGURE 5

FIGURE 5

Disparity of on .

FIGURE 6

FIGURE 6

Disparity of on .

FIGURE 7

FIGURE 7

Disparity of on .

FIGURE 8

FIGURE 8

Disparity of on .

FIGURE 9

FIGURE 9

Disparity of on .

FIGURE 10

FIGURE 10

Disparity of on .

FIGURE 11

FIGURE 11

Disparity of on .

FIGURE 12

FIGURE 12

Disparity of on .

FIGURE 13

FIGURE 13

Disparity of on .

FIGURE 14

FIGURE 14

Disparity of on .

FIGURE 15

FIGURE 15

Disparity of on .

FIGURE 16

FIGURE 16

Disparity of on .

FIGURE 17

FIGURE 17

Disparity of on .

FIGURE 18

FIGURE 18

Disparity of on .

FIGURE 19

FIGURE 19

Disparity of on .

FIGURE 20

FIGURE 20

Disparity of on .

TABLE 1

MReference (Mabood and Das, 2016)Reference (Imtiaz et al., 2019)Present results
11.41421351.41422661.414328374
52.44948972.44952712.449788955
103.316663.31666793.316366745
507.14142847.14147697.143182469
10010.04987510.04992410.048234644

Contrasting outputs of for selected values of when and

TABLE 2

1.010.21.81567
1.51.76525
2.01.75389
30.01.28664
0.41.49317
0.81.67268
02.10848
0.11.91158
0.21.75485

Friction co-efficient for various values ,

TABLE 3

E
1.00.50.20.250.110.30889
1.50.31461
20.31716
30.60.35622
0.70.38809
0.80.41584
0.30.31559
0.40.31162
0.50.30729
0.20.30.31926
0.40.31926
0.50.31926
0.230.32053
60.31881
90.31780
600.34414
0.10.31926
0.20.25176
0.50.31873
1.50.31963
2.50.31996

Local Nusselt number for various values

Table 2 is equipped to check the variance in . For empowered fluid parameter and curvature parameter , friction factor decreases, whereas the reverse trend is observed with. Table 3 is elaborated in variance in Nusselt number for selected values of ,, Q, and E. It is noticed that N rises with uplifting values of and E. N declines with rising values of and and there are no significant changes with .

The impact of on , , and fields is illustrated in Figures 24. It is revealed that velocity diminishes with an escalation in . This notifies that increase in magnetic field obtains the resistive force (Lorentz force) leading to a reduction in the fluid velocity. This also means a reduction in the thickness of the thermal boundary layer. The heat generated causes resistance of the fluid for a greater value of M, which escalates the fluid temperature, and similar behaviour is also seen for the concentration field. Figures 57 presents the disparity of curvature parameter on , , and fields. Figure 5 displays the enhancing values of curvature parameter on velocity field. Here, velocity escalates with a larger value of . This is because enhancing values of lessens the kinematic viscosity of the fluid, which causes a reduction in viscosity and, as a result, the velocity of the fluid gains momentum. Temperature and concentration profiles for various values of are revealed in Figures 6 and 7. It is seen that temperature and concentration decline for augmenting the value of .

Figures 810 analyze the fluid parameter on , , and fields. It can be seen from Figure 8 that velocity profile enhances for a larger value of . Physically, fluid parameter has a reverse relation with viscosity. In contrast, temperature and concentration profiles (Figures 9 and 10) offer a reducing behaviour with a rising value of . Figures 11 and 12 presented the effect of Biot number on and fields. Physical involvement of a larger heat transfer coefficient corresponds to enhancement on and fields. Therefore, and layer thickness is escalated by increasing Biot number .

Figure 13 affirms the increasing activity of temperature profile and thermal boundary layer with Nt. The Nt increase produces a much strong thermophoretic force, causing nanoparticles to move away from the plate. This results in the growth of the Figure 14 symbolizes an upsurge in concentration profile for different values of the thermophoresis variable . Because microscopic particles move from the hot region towards the cold region during the process of thermophoresis. Figure 15 plotted the numerous values of heat source input Q against the temperature profile. Physically, the existence of Q in the boundary layer improves energy and causes a boost in temperature. Figure 16 explicates the enhancing trend of activation energy E on nanoparticle concentration. The activation energy reduces the modified Arrhenius function and causes boosting generative chemical reaction.

Figure 17 presents the dimensionless concentration on the chemical reaction variable. The concentration of nanoparticle is depreciated on the rise of . This behaviour characterizes the decreasing effect of buoyancy force due to concentration gradient, which causes the reduction of concentration profile.

Figure 18 exhibits the variation of the concentration field to diverse values of the Nb. The thickness of the boundary layer and concentration profile decline on increasing Nb input. The reason behind this is that this enriches the pace at which tiny particles drive with various velocities in separate unexpected directions. Figure 19 affirms the declining trend in the concentration field on the escalating values of Sc. This happens because of decaying mass diffusion. Fluctuation for differing values of Prandtl number on temperature is evident in Figure 20. minifies with upshot values of because larger results in lesser thermal diffusivity, thereby bringing about a decrease in temperature.

Conclusion

In this analysis of MHD second

-

grade nanoliquid over a curved stretched sheet with activation energy is explored. The observations are concluded as follows:

  • • Increment exists in the momentum and thermal boundary layer thickness when the fluid parameter enhances.

  • • Velocity distributions show decreasing phenomenon with enhancement in M.

  • • Both velocity and temperature have increasing behaviour for higher K.

  • • Convective heating condition enhances the thermal field significantly.

  • • Brownian movement Nb depreciate for concentration profile.

  • • Concentration is diminished for higher value of.

  • • Increment in fluid parameter decreases the friction factor.

  • • Thermophoresis reduces the volume fraction field and enhances the temperature field.

  • • The temperature profile increases due to temperature heat source Q. An opposite trend is noted in the heat transfer rate.

Statements

Data availability statement

The original contributions presented in the study are included in the article/Supplementary Material, further inquiries can be directed to the corresponding author.

Author contributions

All authors listed have made a substantial, direct, and intellectual contribution to the work and approved it for publication.

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher’s note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors, and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

Glossary

  • fluid parameter

  • thermal diffusivity

  • s & r
  • curvilinear co-ordinates
  • p

    pressure

  • Sc

    Schmidt number

  • electrical conductivity

  • kinematic viscosity

  • T

    fluid temperature

  • DB

    Brownian diffusion coefficient

  • R

    radius

  • heat generation/absorption

  • ambient temperature

  • C

    concentration of the fluid

  • B0

    magnetic field strength

  • thermophoretic diffusion coefficient

  • u and v

    velocity components

  • surface temperature

  • ambient fluid concentration

  • reaction rate

  • fluid density

  • k

    Boltzmann constant

  • Ea

    coefficient of activation energy

  • nanoparticle heat capacity against base fluid heat capacity

  • Prandtl number

  • fluid parameter

  • BCs

    boundary conditions

  • curvature parameter

  • Biot number

  • Nb

    Brownian motion

  • Cw

    surface concentration

  • T

    fluid temperature

    fluid temperature

  • local Reynolds number

  • thermophoresis

  • E

    energy parameter

  • reaction rate parameter

  • temperature difference parameter

  • trs

    shear stress

  • qw

    heat flux

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Summary

Keywords

activation energy, heat generation, nanofluid, second-grade, MHD

Citation

Reddy SC, Asogwa KK, Yassen MF, Adnan, Iqbal Z, M-Eldin S, Ali B and KM S (2022) Dynamics of MHD second-grade nanofluid flow with activation energy across a curved stretching surface. Front. Energy Res. 10:1007159. doi: 10.3389/fenrg.2022.1007159

Received

30 July 2022

Accepted

15 August 2022

Published

06 October 2022

Volume

10 - 2022

Edited by

Umar Khan, Hazara University, Pakistan

Reviewed by

Sohail Ahmad, Bahauddin Zakariya University, Pakistan

Fateh Ali, Xi’an Jiaotong University, China

Updates

Copyright

*Correspondence: Kanayo Kenneth Asogwa,

This article was submitted to Process and Energy Systems Engineering, a section of the journal Frontiers in Energy Research

Disclaimer

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.

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