Significance of Dust Particles, Nanoparticles Radius, Coriolis and Lorentz Forces: The Case of Maxwell Dusty Fluid

This study aimed to analyze the momentum and thermal transport of a rotating dusty Maxwell nanofluid flow on a magnetohydrodynamic Darcy–Forchheimer porous medium with conducting dust particles. Nanouids are the most important source of effective heat source, having many applications in scientific and technological processes. The dust nanoparticles with superior thermal characteristics offer a wide range of uses in chemical and mechanical engineering eras and modern technology. In addition, nanofluid Cu-water is used as the heat-carrying fluid. The governing equations for the two phases model are partial differential equations later transmuted into ordinary ones via similarity transforms. An efficient code for the Runge–Kutta technique with a shooting tool is constructed in MATLAB script to obtain numeric results. The study is compared to previously published work and determined to be perfect. It is observed that the rising strength of the rotating and magnetic parameters cause to recede the x- and y-axis velocities in the two phase fluid, but the temperature function exhibits an opposite trend. By improving the diameter of nanoparticles Dm, the axial velocity improves while transverse velocity and temperature show the opposite behaviors. Furthermore, it is reported that the inclusion of dust particles or nanoparticles both cause to decline the primary and secondary velocities of fluid, and also dust particles decrease the temperature.


Introduction
Non-Newtonian fluids do not follow Newton's viscosity law, having continuous viscosity regardless of stress. Non-Newtonian nanofluids are employed in various technological, vehicle, and typical housekeeping machinery applications. When external forces influence non-Newtonian fluids, their density might change, resulting in more fluids or solids. To develop innovative non-Newtonian nanofluid features, mathematicians worldwide are exploring novel research models throughout all periods of every day and night. Firstly, Powell and Trying introduced non-Newtonian fluid in 1944. Wang et al. [1] addressed numerical investigation of stream, thermal transport, and the mixing of a highly viscous non-Newtonian fluid was conducted. His work helped develop and optimize industrial heat exchangers for high-viscosity non-Newtonian fluids. Wang et al. [2] deliberated the impact of amphiphilic surfaces on the rheological properties and boundary slip of non-Newtonian fluid. This study might be a useful, practical reference for investigating boundary slip in complex fluids, as well as a critical methodology for examining shear thickening fluids (STFs). Over an extending sheet, Megehed et al. [3] discussed the impacts flow of a magnetohydrodynamic nanofluid in the presence of gyrotactic microorganisms across a sheet. Dadheech et al. [22] analyzed entropy formation on two opposite fluids for radiative sloped magnetohydrodynamics slip flow across a sheet with a thermal source. Abo-Dahab et al. [23] investigated the flow of MHD Casson nanofluid with injection/suction across the non-linearized thermal stretched sheet. Nazeer et al. [24] studied a third-grade magnetohydrodynamic electro-osmotic flow in micron duct theoretically. Salahuddin et al. [25] investigated MHD nanofluid flow behavior and heat formation impact on the preliminary channel. Rehman et al. [26] analyzed heat transportation in MHD Carreau fluid to correspond to various flow regimes theoretically. Zhang et al. [27] studied the heat transportation of nanomaterials through the use of an enclosure employing MHD. Several investigators analyzed MHD flow can be studied in [14,[28][29][30].
Due to its wide-ranging uses in sophisticated technologies, engineering, and other branches of science, the flow across a spinning disc has become an advanced subject of research for investigators and engineers. Centrifugal pumps, aeronautical science, engineering areas such as rotating machinery, gas turbine rotors, thermal power-producing systems, air vacuuming devices, and medical equipment are only a few real-world applications. For the very first time, Von Karman studied flow by a rotating disk. Khan et al. [31] discussed numerically the influence of the MHD flow of an Oldroyd-B nanoliquid across a rotating disk with heat and mass transfer. Krishna et al. [32] studied the impact of the magnetic field, thermal radiation, chemical reaction, Hall, and ion slip on the MHD rotational flow of a micro-polar fluid over a moving absorbent sheet. Zubair et al. [33] analyzed the heat transportation of 3D MHD nano liquid rotational flow and shape impacts of Cu nanoparticles across extending sheets. Hayat et al. [34] deliberated the entropy formation and radiation in a rotational stream of viscous nanoliquid between two different geometries. Khan et al. [35] analyzed the rotational flow of Maxwell nanoliquid across a linear/exponential extending surface with double layering. Yacob et al. [36] examined steady 3D rotational flow in nanofluid across extending surfaces in the presence of carbon nanotubes (CNT) nanoparticles. Ali et al. [37] deliberated the Cattaneo-Christov heat flux model using a finite study on the transient MHD rotational flow of Maxwell and tangent hyperbolic nanoliquid across a continuous extending surface numerically. Bagh et al. [38] studied the thermal characteristics of Darcy-Forchheimer fluid flow with a magnetic field effect. Kotresh et al. [39] explored the evaluation of the Arrhenius activation energy in an extended nanoliquid flow across a rotational object, numerically.
Two-phase fluid flow has become more important in the industrial and engineering sectors. One phase is assumed to be dust, while the other is fluid. Large-scale industrial and engineering applications have used dusty nanofluids made of dust substances. As a result, multiple researchers have studied the dusty fluid flow over various surfaces while suspending nanoparticles. Mahanthesh et al. [40] investigated the heat transportation and boundary layer flow in Casson fluid immersed with dust particles across three different shapes (plate, vertical cone, and wedge). Across a vertical plate, Mahanthesh et al. [41] investigated the influence of quadratic convection and thermal radiation on the 2-phase boundary layer flow of nanoliquid, numerically. Mahanthesh et al. [42] studied the dusty Carreau liquid and quadratic transportation of dusty Casson in the presence of thermal radiation with a nonuniform heat source/sink across a stretched surface. In the existence of exponential heat source, the effect of the Hall current on the unsteady heat transference of dusty nanofluid with time-dependent velocity was studied by Mahanthesh et al. [43]. Gireesha et al. [44] examined the impact of the Hall current on the two-phase flow of dusty nanoliquid across the stretching surface by utilizing the KVL model. Mahanthesh et al. [45] discussed the impact of thermal Marangoni convection on two-phase dusty magneto-Casson liquid flow by considering the effect of transpiration cooling. Gireesha et al. [46] explored the effects of the Hall current and heat transportation of dusty liquid with nonlinear thermal radiation across a heated stretched plate.
By analyzing the above literature survey, we deduce that no research has been carried out on the MHD rotating flow of Maxwell fluid with dust particles and nanoparticle radius. Therefore, the prime purpose of the present investigation is to study the outcomes of nanoparticle diameter on the dynamic of Maxwell dusty fluid. Thus, this study explores the consequence of magnetic and Coriolis force effects on dusty fluid flow across extending sheets. The related nonlinear partial differential equations are converted to a system of coupled nonlinear ordinary differential equations by utilizing appropriate similarity modifications. The numerical outcome of the local skin friction coefficient and the local Nusselt number are examined in graphical and tabular form for different physical parameters. The inclusion of dust and nanoparticles with base fluid formed the dusty nanofluid. This numerical report has enormous applications in chemical and mechanical engineering, and others areas, such as the cooling of nuclear reactors, heat exchangers, retrieval of crude oil, waste water treatment, and power technology.

Mathematical Formulation
A three-dimensional laminar rotating flow of incompressible dusty Maxwell, the dynamics of water conveying copper nanoparticles over a stretching sheet, is assumed. The sheet is stretched in the xy-plane, with fluid placed along the z-axis. Fluid rotates about the z-axis with constant velocity Ω. Initially, both dust particles and fluid are supposed to be static. The dust particles are considered uniformly sized spheres, and their density is assumed to be constant throughout the stream. Moreover, the ambient temperature of fluid and temperature at the surface are T ∞ and T w , respectively. Figure 1 demonstrates the coordinate system and flow characteristics. Further, we assume that the thermophysical properties of nanoparticles and base fluid are mentioned in Tables 1 and 2; there is no slip occurring between the tiny particles, and Cu tiny particles and the host fluid are in thermal equilibrium. The fluid is synthesized as a stable compound and sedimentation of particles is ignored. The mathematical model for the flow of the dusty phase, coupled with the constraints, is as follows, based on these physical assumptions and boundary layer approximations [47][48][49].
For dusty particle flow The dimensional boundary conditions arê By introducing similarity transform [50] where η stands for similarity variable. Table 1. Thermophysical properties of nanofluids are represented by mathematical relationships [51].

Properties Nanofluid
Density Nanofuid's Dynamic Viscosity to Base Fluid's Dynamic Viscosity Ratio Equation (1) is identically fulfilled when the above-mentioned transformations are substituted, whereas Equations (2)-(8) have the following structure: For dusty phase with boundary constraints, where represent the Prandtl number, λ = Ω a stands for rotational flow, γ v = 1 τ v c elaborates the fluid particle interaction parameter for velocity, γ v = Nm ρ declares for the mass concentration of dusty granules, Γ t = c p c m represents the ratio of specific heat, β t = 1 aτ T constitutes the temperature o ρ n f a signifies the magnetic field parameter, β m is the Maxwell parameter, Fr = C b √ k * represents the inertia coefficient, and K p = ν f k * a represents the porous medium.

Physical Quantities
The important physical quantities of interest are discussed in this section. The Nusselt coefficients Nu x are given as where q w is the heat flux, we derive the following formulas, The local Reynolds number Re x = u 2 w cν .

Results and Discussion
This research aims to investigate Maxwell nanofluid flow and melting thermal transport across a stretched surface with fluid-particle suspension. The Runge-Kutta approach solves the governed highly nonlinear expressions with associated conditions coded in MAT-LAB. The numerical code validation is obtained by comparing the numerical outcomes of the current and past results of skin friction [47,48] and Nusselt numbers. Our findings are obtained to be in good agreement with them (see Tables 3 and 4). The impact of parameters on momentum, thermal, and concentration layers in dual fluid and dusty phases. We take values of parameters as β m = 0.2, M = 0.5, λ = 0.3, Pr = 2.0,  b and 4a,b depict that the momentum boundary layer of the transport phenomenon rises as the nanoparticles' radius increases. Meanwhile, an increase in the nanoparticles radius causes an increase in friction throughout the layer along the rotating surface; this is because, as Namburu et al. [54] pointed out, increasing the diameter of nanoparticles, the velocity increases during the thermal boundary layer show opposite behavior for fluid and dust particles. On the other hand, the velocity and thermal boundary layer are for various inputs of the magnetic parameter. Here, F (η) signifies momentum in the x-direction for the fluid phase, and F p (η) demonstrates the momentum boundary layer in the x-direction for the dust phase, respectively. It can be seen that the velocity lowered while the temperature boundary layer rose with improving the M inputs. The influence of a magnetic field on an electrically conducting fluid causes the resistive force that tends to reduce the momentum while increasing the thermal boundary layer. Because of this, the magnetic field impact has a wide range of control-based applications, including magnetohydrodynamic ion propulsion, electromagnetic metal casting, magnetohydrodynamic power production, etc. The velocity and thermal boundary layer for different inputs of the diameter of nanoparticles are portrayed in Figures 5 and 6. Here, F (η) signifies the momentum along the x-axis while G(η) is the momentum along the y-axis for the fluid phase, and F p (η) deliberates the momentum of the x-axis while G p (η) represents the momentum in the y-axis for the dust particles, respectively. It is observed that the momentum profile decreased. The reduced viscosity of water-based nanofluid caused due to a larger copper nanoparticles radius leads to a rise in momentum at all levels of energy flow due to the concentration gradient. When the energy flow owing to the concentration gradient is sufficient in magnitude, a drop occurs in temperature distribution over the domain. The other side shows the impact of the rotation parameter λ on the momentum and thermal boundary layer of the fluid and dust particles. The velocity along the x-direction declines and in the y-direction, it enhances fluid and dust particles with improving λ. Thus, an improving λ thermal distribution of fluid and dust particles is depicted in Figure 7a,b. Figures 8-10 are depicted for the influence of the nanoparticles' diameter. It is noticed that improving the D m enhances the axial velocity of fluid and dust particles and depreciates for transverse velocity and temperature. On the other hand, it can be seen that by improving the inputs of the K p depreciation in axial momentum boundary layer thickness, and the rise in the transverse momentum boundary layer, caused due to K p (K p = ν K * a ) is converse to the permeability k * of the porous medium. The higher values of K p mean lower k * and hence higher resistance is offered to the flow to the axial velocities (F (η), F p (η)) and enhances the transverse velocities (G(η), G p (η)), and thermal boundary layers (θ(η), θ p (η)). Similarly, the local inertia parameter Fr on velocity for fluid and dust diminished for growing values of Fr, caused due to inertia coefficient, is a direct relation to the medium porosity and drag force. So when Cb enhances, the liquid resistive force is stronger, and the axial velocity is lower for the fluid and dust phases. It rises in transverse velocity and temperature for fluid and dust particles. The influence of fluid axial velocity (F (η), F p (η)), transverse velocity (G(η), G p (η)), and temperature distribution of Maxwell nanofluid and dust phase, θ and θ p , are depicted in Figures 11-13. Figure 14a,b portrays the momentum boundary layer and thermal boundary layer for various inputs of β m . The axial velocity depreciation occurs with enhanced β m . It is caused because the higher values of β m present a stronger viscous force, which causes a depreciation in the flow and, hence, velocity (F (η), F p (η)) decline. We observed that distributions are tilted toward the boundary when β is enhanced. Figure 15a,b depicts the curve of thermal boundary layers (θ(η), θ p (η)) for different inputs of β m . It is observed that the penetration depth of the thermal boundary layers is enhanced by improving β m . Figure 16a,b depicts that the magnitude of the momentum boundary layer of the transport phenomenon decreases as the fluid particle interaction parameter (γ v ) increases. Further, it is noted from this figure that the magnitude of the primary and secondary dusty fluid velocities are lesser in the dusty nanofluid case as compared to the dusty phase when nanoparticles are ignored. Figures 17a,b and 18a,b show the influence of M and λ on the dynamic of the base fluid velocity with and without dust, and nanofluid, respectively. It is observed that the momentum profile is decreased against higher input of magnetic and rotating parameters, but the momentum profile exhibits more decline when dust particles and nanoparticles are incorporated in the base fluid.
From Figures 19 and 20a-c, the influence of M, λ, & β t on the characteristic of base fluid temperature (θ(η)) is discussed. We discuss two separate cases (with and without dust, and with and without nanofluid) in these two diagrams. We can see from these two diagrams (Figures 19 and 20a,b) that the base fluid temperature rises against the growing strength of magnetic and rotating parameters values, and the nanofluid phase also raises the base fluid temperature, but the opposite trend is observed for the dust particles phase. Physically, the addition of nanoparticles enhances the temperature due to the extraordinary property to enhanced the base fluid temperature. Experts in thermal engineering have embraced the effectiveness of nanofluids due to the improvements in heat transmission throughout fluid movement. Furthermore, Figure 20c shows the decline in the thermal boundary against higher values of β t and nanofluid phase. The nanofluid phase enhances the thermal boundary layer as compared to that without the nanoparticles phase. Physically, the addition of nanoparticles enhances the temperature due to the extraordinary property to enhanced the base fluid temperature. Figure 21a,b portrays the Nusselt number for various inputs of β m , magnetic (M), and rotating (λ). The Nusselt number is decreased negatively against higher values for higher values of β m , magnetic (M), and rotating (λ), but the opposite behavior is reported against the nanoparticles radius.

Conclusions
An effort has been made to investigate the importance of raising the radius of nanoparticles and heat flux due to the thermal boundary gradient in the dynamic of the Maxwell nanofluid across the stretched sheet. The non-dimensional boundary value problem is resolved numerically. The code of the Runge-Kutta method is developed in a MATLAB script. Based on the results, it is reasonable to conclude the following: • Throughout all levels of energy flux caused to the concentration gradient, a decrease in the viscosity of water-based nanofluid due to a larger radius of copper nanoparticles produces an increase in the momentum boundary layer. • It is observed that the growing strength of the rotating and magnetic parameters cause the x and y axis velocities in the two phase fluid to recede, but the temperature function exhibits an opposite trend. • The higher input in the porosity and Forchheimer number causes a decline in the magnitude of the xand y-axis velocities in the two-phase fluid, but the temperature is upgraded. • A significant decline in the thermal boundary layer over the domain, caused due to enhancing the radius of Copper nanoparticles, is feasible when the heat flux caused to the concentration gradient is sufficiently higher in magnitude.

•
The inclusion of dust particles or nanoparticles both cause to decline the primary and secondary velocities of fluid, and also dust particles decrease the temperature, but nanoparticles enhance the base fluid temperature.
• The Nusselt number is decreased negatively against higher values for higher values of β m , magnetic (M), and rotating (λ), but the opposite behavior is reported against the nanoparticles radius. • The present results are compared with the past literature to validate the results.

Conflicts of Interest:
The authors declare that they have no competing interest.

Nomenclature
The following nomenclature is used in this manuscript: T ∞ Ambient temperature, (K) F Co-efficient of inertia of porous material N Dust particle number constant u Fluid velocity components along the x-axis (m 2 s −1 ) v Fluid velocity components along the y-axis (m 2 s −1 ) w Fluid velocity components along the y-axis (m 2 s −1 ) B 0 Magnetic field strength m Mass of dust particle (kg) Nu x Nusselt number k * Permeability of porous medium a positive constant c p Specific heat capacity of the fluid (m s −2 ) Cp Specific heat and constant pressure, (J kg −1 K −1 ) c m Specific heat of dust particle K Stoke's drag constant T Temperature of fluid (K) T w Temperature at the surface, (K) T p Temperature of the dust particle (K) k f Thermal conductivity, (W m −1 K −1 ) u p ,v p ,ŵ p Velocity of dust particles (m 2 s −1 ) Greek Ω Angular velocity, (s −1 )