ORIGINAL RESEARCH article

Front. Energy Res., 26 April 2022

Sec. Solar Energy

Volume 10 - 2022 | https://doi.org/10.3389/fenrg.2022.867734

Heat Transfer Evaluation in MgZn6Zr/C8H18 [(Magnesium–Zinc–Zirconium)/Engine Oil] With Non-linear Solar Thermal Radiations and Modified Slip Boundaries Over a 3-Dimensional Convectively Heated Surface

  • 1. Department of Mathematics, Mohi-ud-Din Islamic University, Nerian Sharif, Pakistan

  • 2. Department of Mathematics and Statistics, Hazara University, Mansehra, Pakistan

  • 3. Department of Mathematics, Faculty of Sciences, HITEC University, Taxila Cantt, Pakistan

  • 4. Department of Mathematics, College of Science Al-Zulfi, Majmaah University, Al-Majmaah, Saudi Arabia

  • 5. Research Centre, Future University in Egypt, New Cairo, Egypt

  • 6. Department of Mechanical Engineering, College of Engineering at Al Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia

  • 7. Department of Mechanical Engineering, University of Tunis EI Manar, Tunis, Tunisia

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Abstract

This analysis is concerned about the thermal performance of [(MgZn6Zr)/C8H18]nf by incorporating the essential concept of non-linear thermal radiations. The flow is configured over a 3D stretchable surface which is heated convectively and the surface boundaries updated with slip effects; uniform suction is applied. The proper mathematical modeling is performed by exercising the nanofluids’ empirical correlations and similarity equations. Thereafter, the RK scheme is utilized to execute the problem solution. The influences of imperative flow constraints are furnished and discussed deeply. The results revealed that [(MgZn6Zr)/C8H18]nf motion decays against suction () and slip effects (). The investigation of the results disclosed that the induction of non-linear thermal radiations in the model boosted the internal energy of the fluid, and hence, the nanofluid thermal efficiency improved. Moreover, convection provided from the surface (Bi number) was also of paramount interest regarding the heat transport in [(MgZn6Zr)/C8H18]nf. Furthermore, significant contribution of the temperature ratio parameter is examined in thermal enhancement. Optimum shear stress trends are investigated due to suction from the surface. Finally, we hoped that the problem would be beneficial in the field of applied thermal engineering, more specifically in the heat transport models.

Introduction

Nanotechnology is the most progressive and potential research area in the modern technological world. The nanoparticles of various metallic/non-metallic ferrites, CNTs, oxides, and alloys are the key ingredients in nanotechnology. In this loop, nanofluids are also imperatively contributed in the nanotechnological world. These are fluids that contain the components of solid nanosized particles of aforesaid nanomaterials with base solvents such as EO (engine oil), SO (syltherm oil), water, EG (ethylene glycol), and PG (propylene glycol). The addition of these solid components in the base solvents enhances thermal conductivity of the resultant liquids which makes them more effective for nanotechnological purposes.

Nanofluids are extensively utilized for nanotechnological purposes, aerodynamics, paint industries, manufacturing of electronic parts, mechanical engineering, chemical engineering, applied thermal engineering, manufacturing of home appliances, and biomedical engineering. In recent times, biomedical nanotechnologists have directed their attention to induct nanofluids in the field of biomedical engineering. The nanoparticles and nanofluids are utilized to target many diseases in the human body. A milestone that biomedical technologists have achieved is the induction of nanoparticles for targeting cancer cells and tumors in different parts of the human body. More specifically, oxide and silver nanoparticles are used to target the tumor cells. The modern chemotherapy treatment is also based on injecting nanoparticles in human parts to signify the tumor cells (Zhao et al., 2011; Ganau et al., 2018; Khan et al., 2020a; Ray and Bandyopadhyay, 2021). Furthermore, the interaction of nanoparticles with blood as the base solvent is an important research zone in the field of biomedical sciences. Figure 1A presents the role of nanoparticles in nanotechnology used in biomedical engineering.

FIGURE 1

FIGURE 1

(A) Nanotechnology and the field of biomedical engineering. (B): Applications of nanofluids in different zones. (C): Hybrid nanofluids’ synthetization process. (D): Schematic representation of the synthetization process of ternary hybrid nanofluids.

World-renowned researchers did not stop their effects, and they worked on the modifications of nanoparticles and synthesized various nanofluids by combining metallic nanoparticles under various base solvents. They introduced two new classes called hybrid and ternary hybrid nanofluids. Therefore, modern effective heat transport fluids can be characterized in the following three classes:

Figures 1B–D elaborate the applications or the synthetization procedure of nano, hybrid, and ternary hybrid nanofluids which have extensive uses in the modern world.

Recently, Ali et al. (2021) disclosed the influences of 1st order activation energy phenomena on thermal transportation in the nanoliquid known as Oldroyd-B nanofluid. The problem is taken over a UHSPR and handled numerically. The disclosed results revealed that the fluid motion rises due to stronger thickness effects and the thermal performance of the fluid improved by the index parameter. The imperative studies regarding heat transfer in bio-convection Carreau fluid and magnetized Williamson fluids are examined in the studies by Shahid et al. (2022) and Bhatti et al. (2022), respectively. The authors observed fascinating results regarding the dynamics of the fluids under various physical circumstances that would be beneficial for industrial applications.

The significance of thermal transport is one of the paramount ingredients in new innovations in the world of nanotechnology. Therefore, investigation of the heat transport mechanism attracts the world-renowned scientists and engineers. Thus, they knocked the door of the modern world and initiated the analysis of nanofluids under various constraints because the significance of the heat transport study strengthens its roots not only in the industrial and engineering zone but also in biomedical engineering, aerodynamics, chemical and mechanical engineering, etc. (

Alqahtani et al., 2020

;

AdnanKhan et al., 2021

). Detection of cancer cells by allowing interaction of oxide nanoparticles with blood as the base solvent is one of the latest milestones achieved by biotechnologists. The most fascinating applications of the nanofluids’ heat transfer lies in the solar thermal plates which increases the capability of the plants to store solar energy. Similarly, there exists a lot of potential applications of nanofluids which are of huge interest of the current world. The conducted research convinced us to disclose the answer to the following questions in front of the modern world’s scientists and engineers.

  • • How to enhance the efficiency of the nanofluids?

  • • What are the impacts of non-linear thermal radiations on the thermal performance of the nanofluids?

  • • What is the role of suction and stretching parameters on the velocity and temperature behavior of the nanofluids over a 3D surface?

  • • What is the significance of convective heat condition in thermal enhancement of the nanofluids?

All the aforementioned issues will be addressed in the extended study and hopefully would be beneficial for applied thermal engineering, biomedical engineering, aerodynamics, more specifically in mechanical engineering and many other purposes that use nanotechnology.

Model Development

Model Statement and Geometry

The flow of the [(MgZn6Zr)/C8H18]nf steady incompressible nanofluid is configured over a 3D stretchable surface. The velocities are organized as directions, respectively. The boundaries of the surface are revised via first-order velocity slip effects, and the surface is convectively heated. Meanwhile, a uniform suction is also imposed from the surface, and the phenomena of non-linear thermal radiations are induced. The setup of the configured flow over the surface is displayed in Figure 2.

FIGURE 2

FIGURE 2

Flow region of (MgZn6Zr)/C8H18.

In light of the boundary layer approximation theory (BLAT), the flow is constituted by the following mathematical form:With associated BCs, it is expressed as follows:

The associated similarity equations are designed as follows:

Thermophysical Attributes of Nanofluids

For a particular nanofluid, the following correlations are adopted:Here; and .

Furthermore, the particular values are described in Table 1 for base solvent engine oil and the nanomaterial:

TABLE 1

Nanoparticle/BS K(W/mk) Cp (J/kgK) (kg/m3)
MgZn6Zr 120 960 2.00
C8H18 0.145 1868 890

Thermophysical values for the base solvent and nanoparticles.

Final [(MgZn6Zr)/C8H18]nf Model

After endorsing the empirical correlations and other related characteristics, the following system is achieved:

The related BCs are reduced in the following version:The physical constraints appearing in the model are (the stretching parameter) and , which is the radiation parameter; represents the Biot parameter, and represents the slip parameter.

Furthermore, trends of shear drags are estimated through the following expressions:

Mathematical Analysis of [(MgZn6Zr)/C8H18]nf

The resultant nanofluid model [(MgZn

6

Zr)/C

8

H18]

nf

is tedious in nature and almost impossible to solve it explicitly for a closed form solution. Therefore, the numerical algorithm is applied which works as described subsequently:

  • • First, the model is written in its appropriate form.

  • • Substitutions are made, according to the order of the model.

  • • Using those substitutions, the higher order model should be transformed into first order IVP.

  • • The BCs are adjusted accordingly, and the conditions are set equal to unknowns which will be determined later.

  • • Finally, the code is allowed to run, and the results are plotted for various physical constraints.

Now, the following transformations are assigned:

Utilization of the aforementioned transformations leads to the following version of the model:

Thereafter, the code is executed for the results.

Results and Discussion Against the Physical Constraints

The velocities (), temperature, and skin friction coefficient under the impact of various physical constraints such as (the stretching parameter), (the slip parameter), (the suction parameter), (the Biot parameter), and (thermal radiation) are provided in the subsequent subsections.

The Velocity of [(MgZn6Zr)/C8H18]nf

The influences of suction, velocity slip, and stretching parameter on the velocity of [(MgZn6Zr)/C8H18]nf over the desired region are displayed in Figures 35, respectively. The velocity drops by strengthening the suction effects from the surface. Physically, when the fluid sucks from the surface, more fluid particles are attracted toward the surface. Consequently, attachment of the particles to the surface upsurges due to which the motion drops. The motion of the fluid layers adjacent to the surface abruptly declines due to the dominant effects of suction. Furthermore, the velocity from the surface to the free stream decays rapidly when is fixed. However, this region increases by assigning the slip parameter value, i.e., . In the surroundings of the surface, the velocity decays promptly because of stronger influences. This behavior of the velocity gradient is elucidated in Figure 3.

FIGURE 3

FIGURE 3

Velocity via R1 for (A) and (B).

The slip parameter effects on are showed in Figure 4. Figure 4A depicts the behaviour of velocity profile against varying γ1. The analysis of the results reveals that the velocity significantly changes for higher slip effects. The asymptotic velocity region decreases for , and the velocity obeys the free streamflow condition almost after . Another view of the fluid motion for various and is depicted in Figure 4B. Observation from the results reveals that this time, maximum decrement in occurs because the suction parameter rises from 0.2 to 1.0. Physically, the particles are stuck with the surface. The fluid layer in the surroundings of the surface has an optimum decreasing behavior, whereas it becomes minimum for successive layers as the friction declines between those layers which allow the particles to move freely.

FIGURE 4

FIGURE 4

Velocity via (the slip parameter) for (A) and (B).

The stretching effects () on the velocity gradient are pictured in Figure 5. The gradient of velocity drops for a more stretchable surface. Physically, the stretching surface enlarges the flow region, and the particles spread over the surface in both directions. Due to enlargement in the surface area, the velocity gradient reduces. However, quite a rapid decrement is noticed when is fixed at .

FIGURE 5

FIGURE 5

Velocity via (the stretching parameter) for (A) and (B).

The Velocity of [(MgZn6Zr)/C8H18]nf

Figures 68 explain to analyze the behavior velocity gradient of [(MgZn6Zr)/C8H18]nf over a 3D stretchable surface. The results are plotted for , , and in Figures 68, respectively.

FIGURE 6

FIGURE 6

Velocity via R1(A) and (B).

FIGURE 7

FIGURE 7

Velocity via(A) and (B).

FIGURE 8

FIGURE 8

Velocity via(A) and (B).

The suction parameter opposes the fluid motion over the surface. The fluid particles along the y-direction are also dragged at the surface due to constant suction. The attraction of particles at the surface is a dominant characteristic of the suction phenomena. Therefore, more particles transform in the surroundings of the surface. The fluid layer very near to the surface moves very slowly due to suction, and the extra existence of friction between the surface and adjacent layer opposes its motion. Thus, the frictional phenomena reduce far from the surface, and the friction between the successive layers decreases; therefore, its fluid velocity drops slowly. It is also noticed that when slip effects change from to , optimum declines in the velocity occur. All these effects are discussed in Figure 6.

Very fascinating trends in the velocity gradient against higher (stretching effects) are elaborated in Figure 7. The stretching parameter boosts the velocity gradient abruptly. More significant changes occur by increasing the stretching parameter. The particles stuck with the surface gain extra momentum due to the sudden stretching of the surface. Therefore, the velocity rises prominently for higher . Considering the concerns of the ambient position of the surface, the velocity decays and follows the ambient flow conditions.

Figure 8 is associated with the variations in for various values of the slippery parameter . The parameter opposes the velocity in the existence of suction () and stretching (). The velocity behavior decreases for a more slippery surface, and maximum changes were noticed when suction effects changed from (Figure 8A) to (Figure 8B). Thus, it is observed that the velocity can be controlled by reducing suction from the surface.

Thermal Behavior of [(MgZn6Zr)/C8H18]nf

Figure 9 elucidates the temperature enhancement in [(MgZn6Zr)/C8H18]nf for various convectively heated surface values. From the results’ inspection, it discloses that the temperature enhances by increasing surface convection. The imposed heat convection condition at the surface contributes to the energy transfer. Physically, the applied convection condition transfers energy to the neighboring particles at the surface. When these particles gain energy to some extent, these provide the energy to the next particles. In a similar way, the fluid temperature enlarges. In the surface surroundings, these effects are dominant due to stronger convection. The temperature vanishes ambiently for ,while for a more slippery surface (), the ambient position enlarges.

FIGURE 9

FIGURE 9

Temperature via(A) and (B).

Thermal radiation is an imperative physical phenomenon to improve thermal efficiency of the nanofluids and regular liquids to some limit. Thermal radiations in the existence of the convective heat condition imperatively contribute to thermal enhancement of the nanofluid. Imposed thermal radiations provide energy to the fluid particles that upsurge the ability of the temperature. High thermal radiations are a better heat transport source in the study of nanofluids. Furthermore, high thermal conductance of the nanofluid plays an important role in the energy transport. These effects are displayed in Figure 10.

FIGURE 10

FIGURE 10

Temperature via Rd (A) and (B).

Figures 11 and 12 highlight the temperature variations for suction and stretching effects, respectively. It is inspected that temperature drops for both suction and . Physically, collision between the particles declines, and when the fluid particles become more compact due to a stronger suction near the surface, temperature drops. Asymptotic behavior of the temperature occurs far from the surface (free stream position). On the other hand, temperature behavior against stretching effects is shown in Figure 12. This time, temperature reduces quite slowly than suction variations. Figure 13 discloses that temperature of [(MgZn6Zr)/C8H18]nf rises for the increasing temperature ratio parameter . The temperature rises very slowly, and finally, it obeys the ambient temperature condition.

FIGURE 11

FIGURE 11

Temperature via(A) and (B).

FIGURE 12

FIGURE 12

Temperature via(A) and (B).

FIGURE 13

FIGURE 13

Temperature via(A) and (B).

Skin Friction, Streamlines, and Isotherms

Figures 14 and 15 present the shear stress trends along both directions ( and ), against suction (), slip (), and stretching () effects, respectively. From Figure 14 to Figure 15, decrement in the shear stresses (along both directions) is noticed for a stronger slippery surface. However, shear stresses upsurge for suction and stretching parameters. Maximum increment occurs for (). An interesting pattern for streamlines and isotherms against the pertinent parameters is elucidated in Figure 16 and Figure 17, respectively.

FIGURE 14

FIGURE 14

Skin friction via(A)(B) and (C).

FIGURE 15

FIGURE 15

Skin friction in y-direction via(A)(B) and (C).

FIGURE 16

FIGURE 16

Streamlines via(A), (B), (C) 3D for , and (D) 3D for .

FIGURE 17

FIGURE 17

Isotherms via(A), (B), (C) 3D for , and (D) 3D for .

FIGURE 18

FIGURE 18

Authentication of the study with a previously reported study.

Reliability of the Study

This subsection is organized to align the conducted study with previously reported work. Therefore, a graphical comparison is provided by restricting the involved physical constraints () with the published work of Devi et al. (Devi and Devi, 2016) with . It is realized that the velocity curves of the present work under restricted parametric values coincide with the existing work which provide the study’s reliability. Comparative analysis is depicted in Figure 18 for varying St

Conclusion

A study of [(MgZn

6

Zr)/C

8

H

18

]

nf

was conducted over a three-dimensional surface by encountering the influences of thermal radiations and the convective heat condition. The boundaries of the surface are modified with velocity slip, suction, and stretching effects. The governing flow model of [(MgZn

6

Zr)/C

8

H

18

]

nf

is solved numerically, and the results are provided against the physical constraints. From the study, it is summarized that

  • • The velocities of [(MgZn6Zr)/C8H18]nf reduce by strengthening suction () and slip () parameters.

  • • The velocity significantly rises for the stretching parameter, and more significant changes occur at the surface.

  • • The convective heat condition provides extra energy to the fluid particles from the surface which enhanced [(MgZn6Zr)/C8H18]nf temperature.

  • • Thermal radiations are also significantly contributed for thermal enhancement in [(MgZn6Zr)/C8H18]nf.

  • • The study of [(MgZn6Zr)/C8H18]nf will be more effective in applied thermal engineering and heat transport problems in the modern world.

Statements

Data availability statement

The study was based on numerical computations and data required for the study. The raw data supporting the conclusion of this article will be made available by the authors, without undue reservation.

Author contributions

Adnan and UK investigated the research gap and performed mathematical modeling; Adnan and UK wrote the original draft; NA and IK coded the model and methodology; Adnan, NA and IK contributed to results and discussion; AM and SM validated the study; Adnan, AM and SM revised the manuscript.

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.

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Summary

Keywords

heat transfer, (MgZn6Zr)/C8H18 nanofluid, thermal radiation, velocity slip, convective heat

Citation

Adnan, Khan U, Ahmed N, Khan I, Mohamed A and Mehrez S (2022) Heat Transfer Evaluation in MgZn6Zr/C8H18 [(Magnesium–Zinc–Zirconium)/Engine Oil] With Non-linear Solar Thermal Radiations and Modified Slip Boundaries Over a 3-Dimensional Convectively Heated Surface. Front. Energy Res. 10:867734. doi: 10.3389/fenrg.2022.867734

Received

01 February 2022

Accepted

10 March 2022

Published

26 April 2022

Volume

10 - 2022

Edited by

Hsien-Yi (Sam) Hsu, City University of Hong Kong, Hong Kong SAR, China

Reviewed by

M. M. Bhatti, Shandong University of Science and Technology, China

Iskander Tlili, Monastir, Tunisia

Updates

Copyright

*Correspondence: Adnan,

This article was submitted to Solar Energy, 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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