Computational Fluid Dynamics Analysis of Moisture Ingress in Aircraft Structural Composite Materials

Bég, O. Anwar; Islam, B; Shamshuddin, Md.; Bég, Tasveer A.

doi:10.1007/s13369-019-03917-4

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…It, therefore, represents the conversion of kinetic energy into internal energy by work done against the viscous fluid stresses. Although this parameter is often used in a high-speed compressible flow, for example in rocket aerodynamics at very altitude, it has significance in high-temperature incompressible flows, which are encountered in energy systems, etc [55]. Positive Eckert number implies cooling of the wall and therefore a transfer of heat to the fluid.…”

Section:  mentioning

confidence: 99%

Dissipative-Radiative Micropolar Fluid Transport in a Non-Darcy Porous Medium with Cross-Diffusion Effects

Ferdows¹,

Shamshuddin²,

Zaimi³

2020

CFDL

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In this work, the micropolar fluid flow and heat and mass transfer past a horizontal stretching sheet through a porous medium are studied including the Soret-Dufour effect in the presence of viscous dissipation. A uniform magnetic field is applied transversely to the direction of the flow. The governing differential equations of the problem are transformed into a system of non-dimensional differential equations which are solved numerically by Nachtsheim-Swigert iteration technique along with the sixth order Runge-Kutta integration scheme. The velocity, microrotation, temperature and concentration profiles are presented for different parameters and interpreted at length. Results show that with an increase in vortex viscosity ratio parameter, suction parameter and radiation parameter, velocity is decreased whereas it increases with the increase of magnetic parameter, Darcy number and Eckert number. Angular velocity significantly elevated by increasing the suction parameter, surface nonlinearity parameter and magnetic parameter. Temperature gradient escalate with the increase of magnetic parameter and Dufour number, while a reverse trend is observed in case of increase of Darcy number, Eckert number and Soret number. Concentration gradient putrefies with Schmidt number and Dufour number. However, concentration grows with Soret number. The present problem finds significant applications in hydromagnetic control of conducting polymeric sheets and magnetic materials processing.

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Section:  mentioning

confidence: 99%

Dissipative-Radiative Micropolar Fluid Transport in a Non-Darcy Porous Medium with Cross-Diffusion Effects

Ferdows¹,

Shamshuddin²,

Zaimi³

2020

CFDL

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“…The Darcy model is employed to analyze the bulk matrix drag effect. This model has been utilized successfully in previous computational materials coating simulations 30‐32 and is valid for viscous‐dominated flows in homogenous, isotropic permeable media. The Tiwari‐Das nanoscale model 33 is employed, which allows variation of nano‐particle volume fraction to be studied for specific nanoparticles, and in this regard the Tiwari‐Das formulation is superior to the Buongiorno two‐component nanoscale model 34 .…”

Section: Introductionmentioning

confidence: 99%

Computation of radiative Marangoni (thermocapillary) magnetohydrodynamic convection in a Cu‐water based nanofluid flow from a disk in porous media: Smart coating simulation

et al. 2020

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With emerging applications for smart and intelligent coating systems in energy, there has been increasing activity in researching magnetic nanomaterial coating flows. Surface tension features significantly in such regimes, and in the presence of heat transfer, Marangoni (thermocapillary) convection arises. Motivated by elaborating deeper the intrinsic transport phenomena in such systems, in this paper, a mathematical model is developed for steady radiative heat transfer and Marangoni magnetohydrodynamic flow of a Cu‐water nanofluid influencing a strong magnetic field through a porous disk. The semianalytical adomain decomposition method is employed to find the solution of flow governing equations, which are reduced into ordinary differential equation form via the Von Karman similarity transformation. Validation with a generalized differential quadrature algorithm is included. The response in dimensionless velocity, temperature, wall heat transfer rate and shear stress is investigated for various values of the control parameters. Temperature is reduced with increasing Marangoni parameter, whereas the flow is accelerated. With increasing permeability parameter, the temperatures are elevated. Increasing radiative flux boosts temperatures further from the disk surface. Increasing magnetic parameter strongly dampens the boundary layer flow and elevates the temperatures, also eliminating temperature oscillations at lower magnetic field strengths.

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Thermal performance analysis of non‐Newtonian fluid transport through turbine discs

et al. 2021

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In this paper, the analytical investigation of non-Newtonian fluid flow through a turbine disc with a heat generation effect is considered. The flow mechanics through the turbine disc is modeled using a coupled system of higher-order partial equations, which are transformed into ordinary order utilizing proper similarity transforms. Governing models are analyzed using the variation iteration and homotopy perturbation analytical methods. As observed from the results, the study shows enhancement of heat generation for non-Newtonian fluid flow through turbine disc, reveals abating thermal distribution. More so, the graphical expression shows that heat generation improves up till mid-disc. Thereafter, an increasing trend toward the fluid injection surface is observed. Validation of analytical solutions with numerical analysis boosts confidence in this study, which may be used to provide further insights into the engineering science of non-Newtonian flow of hydraulic/lube oil in practical applications, such as hydraulic couplings.

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Computational Fluid Dynamics Analysis of Moisture Ingress in Aircraft Structural Composite Materials

Cited by 9 publications

References 25 publications

Dissipative-Radiative Micropolar Fluid Transport in a Non-Darcy Porous Medium with Cross-Diffusion Effects

Dissipative-Radiative Micropolar Fluid Transport in a Non-Darcy Porous Medium with Cross-Diffusion Effects

Computation of radiative Marangoni (thermocapillary) magnetohydrodynamic convection in a Cu‐water based nanofluid flow from a disk in porous media: Smart coating simulation

Thermal performance analysis of non‐Newtonian fluid transport through turbine discs

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