Zafar Hayat Khan
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View article: Time-fractional analysis of free convection in a heated square cavity
Time-fractional analysis of free convection in a heated square cavity Open
This study presents a comprehensive numerical analysis of time–fractional free convection in a square cavity with a heated vertical wall, governed by the time-fractional Navier–Stokes equations incorporating Caputo derivatives to account f…
View article: Fractional order unsteady mixed convection in porous-filled concentric pipes: Entropy analysis
Fractional order unsteady mixed convection in porous-filled concentric pipes: Entropy analysis Open
This study presents a comprehensive analysis of entropy generation in unsteady mixed convection flow within the annular region of concentric cylindrical pipes filled with a porous medium, incorporating the effects of time fractional order …
View article: Fractional order analysis of radiating couple stress MHD nanofluid flow in a permeable wall channel
Fractional order analysis of radiating couple stress MHD nanofluid flow in a permeable wall channel Open
This study explores the entropy analysis of a radiating couple stress magnetohydrodynamic (MHD) nanofluid flow using a time-fractional order approach within a permeable vertical wall channel. The nanofluid's behavior is influenced by vario…
View article: Entropy generation and heat transfer in Time-Fractional mixed convection of nanofluids in Darcy-Forchheimer porous channel
Entropy generation and heat transfer in Time-Fractional mixed convection of nanofluids in Darcy-Forchheimer porous channel Open
This study investigates the role of time-fractional derivatives in the entropy analysis of mixed convection in a reacting nanofluid within a vertical permeable channel saturated with a Darcy-Forchheimer porous medium. This is crucial for e…
View article: Structural and impedance analysis of tin-sulphide (SnS) nanoparticles produced with the help of hydrothermal process
Structural and impedance analysis of tin-sulphide (SnS) nanoparticles produced with the help of hydrothermal process Open
The three samples of SnS with different molarity 1ml, 0.5ml and 0.25ml were prepared by hydrothermal method. The prepared samples were characterized by XRD, SEM and impedance spectroscopies. XRD confirmed the cubic and orthorhombic structu…
View article: Investigating bifurcations and thermal behavior in chaotic fractional-order exothermic reactions with reactant consumption
Investigating bifurcations and thermal behavior in chaotic fractional-order exothermic reactions with reactant consumption Open
This study presents a complete investigation of the chaotic fractional-order exothermic decomposition in a flow channel, concentrating on the interaction between reactant consumption and thermal dynamics. By employing a time-fractional der…
View article: Effects of sinusoidal wall temperature on thermal dynamics and irreversibility around an inclined plate embedded in a square cavity
Effects of sinusoidal wall temperature on thermal dynamics and irreversibility around an inclined plate embedded in a square cavity Open
Effective thermal and flow control within complex geometries is essential for engineering applications. In this study, an in-depth examination of flow dynamics, entropy, and thermal regulation is undertaken within a square cavity featuring…
View article: Impact of multiple slips and thermal radiation on heat and mass transfer in MHD Maxwell hybrid nanofluid flow over porous stretching sheet
Impact of multiple slips and thermal radiation on heat and mass transfer in MHD Maxwell hybrid nanofluid flow over porous stretching sheet Open
This study investigates the two-dimensional magnetohydrodynamic (MHD) boundary-layer flow over a stretching sheet embedded in a porous medium, focusing on the innovative use of hybrid nanofluids. The research has practical applications in …
View article: Transient flow and heat transfer characteristics of single-phase nanofluid past a stretching sheet under the influence of thermal radiation and heat source
Transient flow and heat transfer characteristics of single-phase nanofluid past a stretching sheet under the influence of thermal radiation and heat source Open
This work aims to investigate the unsteady hydromagnetic free convective flow of a viscous, electrically incompressible fluid influenced by an inclined magnetic field, radiation, and heat source. Specifically, it explores the behavior of w…
View article: Effects of thermal boundary conditions on Stokes' second problem
Effects of thermal boundary conditions on Stokes' second problem Open
In this investigation, an infinite flat plate is employed to examine the flow behavior of Casson fluid and the associated heat transfer phenomena. The plate undergoes an initial acceleration with a constant velocity until it eventually dec…
View article: Inherent irreversibility in unsteady magnetohydrodynamic nanofluid flow past a slippery permeable vertical plate with fractional-order derivative
Inherent irreversibility in unsteady magnetohydrodynamic nanofluid flow past a slippery permeable vertical plate with fractional-order derivative Open
This study focuses on fractional-order derivatives for the unsteady flow of magnetohydrodynamic (MHD) methanol-iron oxide (CH3OH-Fe3O4) nanofluid over a permeable vertical plate. The utilization of fractional-order derivatives provides a m…
View article: Mixed convection flow in a channel with a dimpled section and adiabatic cylindrical obstacle under the influence of magnetic and Joule effects
Mixed convection flow in a channel with a dimpled section and adiabatic cylindrical obstacle under the influence of magnetic and Joule effects Open
This study investigates the mixed convection flow in a channel with a dimpled section and an adiabatic cylindrical obstacle under the influence of a magnetic field. The channel has a heated dimpled portion, while the flat horizontal walls …
View article: Secondary School Students’ Level of Awareness about the Causes of Environmental Change in the Khyber Pakhtunkhwa Province of Pakistan
Secondary School Students’ Level of Awareness about the Causes of Environmental Change in the Khyber Pakhtunkhwa Province of Pakistan Open
This study intends to assess students' attitudes at secondary-level schools about the causes of environmental changes and related issues across Khyber Pakhtunkhwa province, Pakistan. All human beings, especially students at the school leve…
View article: Mechanical Integrity and Failure Analysis of Photovoltaic Modules under Simulated Snow Loads Using Pneumatic Airbag Setup
Mechanical Integrity and Failure Analysis of Photovoltaic Modules under Simulated Snow Loads Using Pneumatic Airbag Setup Open
Photovoltaic (PV) modules have emerged as an ideal technology of choice for harvesting vastly available renewable energy resources. However, the efficiency of PV modules remains significantly lower than that of other renewable energy sourc…
View article: Estimation of road closure risks along the Bruce highway using the AWRA-L water balance model
Estimation of road closure risks along the Bruce highway using the AWRA-L water balance model Open
The Bureau of Meteorology, in collaboration with the Queensland Department of Transport and Main Roads, conducted a case study that aimed to evaluate the performance of nine-day runoff forecasts in predicting road flooding for selected riv…
View article: Nanoporous Alumina Membranes for Sugar Industry: An Investigation of Sintering Parameters Influence onUltrafiltration Performance
Nanoporous Alumina Membranes for Sugar Industry: An Investigation of Sintering Parameters Influence onUltrafiltration Performance Open
Ultrafiltration membranes offer a progressive and efficient means to filter out various process fluids. The prime factor influencing ultrafiltration to a great extent is the porosity of the membranes employed. Regarding membrane developmen…
View article: Double-diffusive flow in a porous right-angle trapezoidal enclosure with constant heat flux
Double-diffusive flow in a porous right-angle trapezoidal enclosure with constant heat flux Open
A computation analysis is performed to study double-diffusive natural convection in a right-angle trapezoidal cavity packed with a porous medium. The horizontal top and bottom boundaries are insulated and impermeable. The vertical left sid…
View article: Mixed convection of single-walled carbon nanotubes in a triangular cavity containing a pentagonal impediment
Mixed convection of single-walled carbon nanotubes in a triangular cavity containing a pentagonal impediment Open
Mixed convection of nanofluid (a homogeneous mixture of water and single-walled carbon nanotubes) is investigated numerically in a triangular cavity containing an adiabatic pentagonal obstacle close to the top surface. Analytical models ar…
View article: Indigenous technical knowledge in pest management
Indigenous technical knowledge in pest management Open
Since inception of human civilization man has been fully dependent upon nature for food, fibre and habitat. In the course of development, man learned to domesticate and cultivate plants. And thus, the plants became crops. On the other hand…
View article: Natural convection effects on heat and mass transfer of slip flow of time-dependent Prandtl fluid
Natural convection effects on heat and mass transfer of slip flow of time-dependent Prandtl fluid Open
We proposed a mathematical model for an incompressible, viscous, natural convection, and stagnation point slip flow of MHD Prandtl fluid over an infinite plate. The governing flow equations are constructed using the Prandtl rheological mod…
View article: Numerical Simulation of Nanoparticles with Variable Viscosity over a Stretching Sheet
Numerical Simulation of Nanoparticles with Variable Viscosity over a Stretching Sheet Open
The effects of different types of base fluids on carbon nanotube (CNT) nanofluids flow over a circular stretching sheet are numerically analyzed. The nonlinear variation of radial velocity in radial direction is assumed at surface of stret…
View article: Numerical investigation of Cattanneo-Christov heat flux in CNT suspended nanofluid flow over a stretching porous surface with suction and injection
Numerical investigation of Cattanneo-Christov heat flux in CNT suspended nanofluid flow over a stretching porous surface with suction and injection Open
The present study analyzes the heat energy transfer in nano fluids flow through the porous stretching surface. Cattanneo-Christov heat flux model is employed to study the heat energy transfer. Darcy law is used to discuss the flow characte…
View article: Analysis of Entropy Generation in Flow of Methanol-Based Nanofluid in a Sinusoidal Wavy Channel
Analysis of Entropy Generation in Flow of Methanol-Based Nanofluid in a Sinusoidal Wavy Channel Open
The entropy generation due to heat transfer and fluid friction in mixed convective peristaltic flow of methanol-Al2O3 nano fluid is examined. Maxwell’s thermal conductivity model is used in analysis. Velocity and temperature profiles are u…
View article: Magneto-nanofluid flow with heat transfer past a stretching surface for the new heat flux model using numerical approach
Magneto-nanofluid flow with heat transfer past a stretching surface for the new heat flux model using numerical approach Open
Purpose Sheet processing of magnetic nanomaterials is emerging as a new branch of smart materials’ manufacturing. The efficient production of such materials combines many physical phenomena including magnetohydrodynamics (MHD), nanoscale, …
View article: The Stokes’ second problem for nanofluids
The Stokes’ second problem for nanofluids Open
In this paper, a nanofluid version of the Stokes’ second problem is investigated. For this purpose, a homogeneous model is considered with nano-sized Cu particles suspended in water. The governing equations are first transformed in dimensi…