Nur Syahirah | UPM - Universiti Putra Malaysia (original) (raw)

Papers by Nur Syahirah

Research paper thumbnail of Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

Mathematics

The widespread application of hybrid nanofluid in real applications has been accompanied by a lar... more The widespread application of hybrid nanofluid in real applications has been accompanied by a large increase in computational and experimental research. Due to the unique characteristics of hybrid nanofluid, this study aspires to examine the steady two-dimensional mixed convection stagnation point flow of a hybrid nanofluid past a vertical plate with radiation, Dufour, and Soret effects, numerically. The formulations of the specific flow model are presented in this study. The model of fluid flow that is expressed in the form of partial differential equations is simplified into ordinary differential equations via the transformation of similarity, and then solved numerically by using the boundary value problem solver known as bvp4c in MATLAB, which implements the finite difference scheme with the Lobatto IIIa formula. Two possible numerical solutions can be executed, but only the first solution is stable and meaningful from a physical perspective when being evaluated via a stability a...

Research paper thumbnail of Unsteady MHD mixed convection flow of a hybrid nanofluid with thermal radiation and convective boundary condition

Chinese Journal of Physics

Research paper thumbnail of Magnetohydrodynamics unsteady separated stagnation‐point (USSP) flow of a hybrid nanofluid on a moving plate

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik

Research paper thumbnail of The flow of hybrid nanofluid past a permeable shrinking sheet in a Darcy–Forchheimer porous medium with second-order velocity slip

Waves in Random and Complex Media

Research paper thumbnail of Three-Dimensional Radiative Flow of Hybrid Nanofluid Past a Shrinking Plate with Suction

Journal of Advanced Research in Fluid Mechanics and Thermal Sciences

Hybrid nanofluid has been widely used in various heat transfer applications especially as the hea... more Hybrid nanofluid has been widely used in various heat transfer applications especially as the heat exchanger due to the great thermal conductivity compared to the conventional fluid. However, numerous investigations should still be carried out to properly understand its properties. Hence, in this study, a three-dimensional radiative flow of hybrid Cu-Al2O3/water nanofluid past a permeable shrinking plate is numerically analyzed. The boundary layer including the energy equations are reduced to a system of ordinary differential equations using the similarity transformations and are then solved numerically by using the bvp4c solver in MATLAB. The application of suction through the permeable plate is necessary in aiding the fluid motion past the shrinking surface. Dual solutions are also observable, hence the stability analysis is conducted to mathematically validate the real solution. The enhancement of copper volumetric concentration in the hybrid nanofluid is capable in decelerating ...

Research paper thumbnail of Marangoni hybrid nanofluid flow over a permeable infinite disk embedded in a porous medium

International Communications in Heat and Mass Transfer

Abstract The importance of porous medium and hybrid nanofluid in the augmentation of heat transfe... more Abstract The importance of porous medium and hybrid nanofluid in the augmentation of heat transfer process has been realized by the researchers. Hence, a numerical boundary layer exploration towards Marangoni hybrid nanofluid flow over a permeable infinite disk placed in a porous medium is carried out. 1% volume fraction of alumina is hybridized with (0.01 − 1)% volume fraction of copper in the water. The solver in Matlab software (bvp4c) is applied to enumerate the solutions. The non-unique (dual) solutions are discoverable for the shrinking disk and only the first solution is real. The upsurges of copper volume fraction, porosity and suction parameters enable the heat transfer rate to enhance and decelerate the boundary layer bifurcation at the shrinking disk.

Research paper thumbnail of MHD mixed convection flow of a hybrid nanofluid past a permeable vertical flat plate with thermal radiation effect

Alexandria Engineering Journal

Abstract The magnetohydrodynamic (MHD) radiative flow of a hybrid alumina-copper/water nanofluid ... more Abstract The magnetohydrodynamic (MHD) radiative flow of a hybrid alumina-copper/water nanofluid past a permeable vertical plate with mixed convection is the focal interest in this present work. Dissimilar to the traditional nanofluid model that considers only one type of nanoparticles, we consider the hybridization of two types of nanoparticles in this work which are alumina and copper. The governing flow and heat transfer equations are simplified to the ordinary differential equations (ODEs) with the adaptation of conventional similarity transformations which are then evaluated by the bvp4c solver (MATLAB) to generate the numerical solutions. The solutions are generated and illustrated in the form of graph to be easily observed. Although dual solutions are obtained in this study, only one solution is determined to be stable. By reducing the concentration volume of copper and increasing the magnetic and radiation parameters, the boundary layer separation can be hindered. With the occurrence of opposing flow due to the mixed convection parameter, the heat transfer can be enhanced when the concentration volume of copper is being reduced and when the magnetic and radiation parameters are being proliferated.

Research paper thumbnail of Mixed convection of a three-dimensional stagnation point flow on a vertical plate with surface slip in a hybrid nanofluid

Chinese Journal of Physics

Abstract Hybrid nanofluid has become one of the major interest topics among researchers nowadays ... more Abstract Hybrid nanofluid has become one of the major interest topics among researchers nowadays due to its significant impact in myriad applications. This paper modelled and explored the properties of flow and heat transfer of mixed convection stagnation point flow for hybrid nanofluid (alumina-copper/water) on a vertical plate with slips and suction. By using the method of similarity transformation, the governing set of partial differential equations (PDEs) are transformed into ordinary differential equations (ODEs). These derived equations are then evaluated numerically by adopting the bvp4c function that is available in Matlab software. In the presence of slips together with the opposing flow of mixed convection, the local Nusselt number (heat transfer rate) can be augmented by increasing the solid volume fraction of copper. The surge of 0.5% of copper volume fraction can accelerate the heat transfer rate by approximately 1.3% in this present analysis within the specified value of slips, mixed convection, and suction. The stability analysis is conducted due to the existence of dual solutions and only the first solution is stable for practical application.

Research paper thumbnail of Flow and heat transfer of hybrid nanofluid induced by an exponentially stretching/shrinking curved surface

Case Studies in Thermal Engineering

The efficient performance of heat transfer fluid in terms of thermal conductivity plays a signifi... more The efficient performance of heat transfer fluid in terms of thermal conductivity plays a significant role in thermal engineering activities. In this work, the flow of boundary layer and heat transfer of hybrid nanofluid induced by an exponentially permeable stretching/shrinking curved surface is modelled and scrutinized numerically. Facilitated by bvp4c function, the ordinary differential equations are being solved. The implications of some intended parameters towards the physical quantities are plotted, while the comparison of results for the validation purpose is also tabulated. We found out that the boundary layer separation is deferred as copper volume fraction and curvature parameters increased. The stability analysis for the flow is conducted as the dual solutions are visible. The first (second) solution of the hybrid nanofluid flow is observed to be stable (unstable). For the physical solution, the increment in copper volume fraction leads to the accretion of the skin friction coefficient at the shrinking surface but has reduced the local Nusselt number. The presence of hybrid nanofluid has enhanced the velocity and temperature profiles. Generally, this study provides the initial prediction for the scientist and engineers in controlling the parameters to achieve the optimum desires for the related practical applications.

Research paper thumbnail of MHD hybrid nanofluid flow with convective heat transfer over a permeable stretching/shrinking surface with radiation

International Journal of Numerical Methods for Heat & Fluid Flow

Purpose The purpose of this paper is to numerically investigate the hybrid nanofluid flow with th... more Purpose The purpose of this paper is to numerically investigate the hybrid nanofluid flow with the imposition of magnetohydrodynamic (MHD) and radiation effects alongside the convective boundary conditions over a permeable stretching/shrinking surface. Design/methodology/approach The mathematical model is formulated in the form of partial differential equations (PDEs) and are then transformed into the form of ordinary differential equations (ODEs) by using the similarity variables. The deriving ODEs are solved numerically by using the bvp4c solver in MATLAB software. Stability analysis also has been performed to determine the stable solution among the dual solutions obtain. For method validation purposes, a comparison of numerical results has been made with the previous studies. Findings The flow and the heat transfer of the fluid at the boundary layer are described through the plot of the velocity profile, temperature profile, skin friction coefficient and local Nusselt number that...

Research paper thumbnail of MHD Hybrid Cu-Al2O3/ Water Nanofluid Flow with Thermal Radiation and Partial Slip Past a Permeable Stretching Surface: Analytical Solution

Journal of Nano Research

The influence of velocity slip and thermal radiation effects on the magnetohydrodynamic hybrid Cu... more The influence of velocity slip and thermal radiation effects on the magnetohydrodynamic hybrid Cu-Al2O3/water nanofluid flow over a permeable stretching sheet is reported in this paper. The similarity transformation is adopted to reduce the partial differential equations to the ordinary differential equations. Exact analytical method is implemented to solve the problem. Maple program is used to facilitate the calculation process. The new additional effects which are the velocity slip and thermal radiation effects are considered towards the model to scrutinize the impacts. The effects of various parameters towards the velocity and temperature profiles are demonstrated through graphs, meanwhile the skin friction coefficient and the local Nusselt number are exhibited through the tabulation of data. The existence of velocity slip reduced the velocity profile but enhanced the temperature profile. The thermal radiation effect has increased the temperature profile. The heat transfer rate a...

Research paper thumbnail of Flow and heat transfer of hybrid nanofluid over a permeable shrinking cylinder with Joule heating: A comparative analysis

Alexandria Engineering Journal

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Research paper thumbnail of Effect of suction on the stagnation point flow of hybrid nanofluid toward a permeable and vertical Riga plate

Heat Transfer

2.1 Prenatal human craniofacial growth and devel opment. 2.2, Prenatal forelimb (arm) growth and ... more 2.1 Prenatal human craniofacial growth and devel opment. 2.2, Prenatal forelimb (arm) growth and deveìopment in the human. CI.IAPTER IiI. NO RMAL RODENT PRENATAL GROI,,TH AND DEVEL(jPMENT OF THE CRANiO FACIAL COI'{PLTX AND FORTLIMB. CHAPTIR IV. CHAPTER V. 3.1 Prenatal rodent craniofacial growth and devel opment. 3.2 Fetal rat mandjbular growth and developmr:nt' 3. 3 Feta.l rat I irnb growth and devel opment. 3.4 T*nrporal comparisons in development betleen man and rat. PATHOGTNiSIS OF ÛRANI()FACIAL MALFO}ìi'lATIONS l^J0Ui'iD HL.

Research paper thumbnail of Hybrid Nanofluid Slip Flow over an Exponentially Stretching/Shrinking Permeable Sheet with Heat Generation

Mathematics

An investigation has been done on the hybrid nanofluid slip flow in the existence of heat generat... more An investigation has been done on the hybrid nanofluid slip flow in the existence of heat generation over an exponentially stretching/shrinking permeable sheet. Hybridization of alumina and copper with water as the base fluid is considered. The mathematical model is simplified through the similarity transformation. A numerical solver named bvp4c in Matlab software is utilized to facilitate the problem-solving process and dual solutions are attained. The influences of several pertinent parameters on the main physical quantities of interest and the profiles are scrutinized and presented in the form of graphs. Through the stability analysis, only the first solution is considered as the physical solution. As such, the findings conclude that the upsurges of volume fraction on the copper nanoparticle could enhance the skin friction coefficient and the local Nusselt number.

Research paper thumbnail of Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects

Mathematics

The widespread application of hybrid nanofluid in real applications has been accompanied by a lar... more The widespread application of hybrid nanofluid in real applications has been accompanied by a large increase in computational and experimental research. Due to the unique characteristics of hybrid nanofluid, this study aspires to examine the steady two-dimensional mixed convection stagnation point flow of a hybrid nanofluid past a vertical plate with radiation, Dufour, and Soret effects, numerically. The formulations of the specific flow model are presented in this study. The model of fluid flow that is expressed in the form of partial differential equations is simplified into ordinary differential equations via the transformation of similarity, and then solved numerically by using the boundary value problem solver known as bvp4c in MATLAB, which implements the finite difference scheme with the Lobatto IIIa formula. Two possible numerical solutions can be executed, but only the first solution is stable and meaningful from a physical perspective when being evaluated via a stability a...

Research paper thumbnail of Unsteady MHD mixed convection flow of a hybrid nanofluid with thermal radiation and convective boundary condition

Chinese Journal of Physics

Research paper thumbnail of Magnetohydrodynamics unsteady separated stagnation‐point (USSP) flow of a hybrid nanofluid on a moving plate

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik

Research paper thumbnail of The flow of hybrid nanofluid past a permeable shrinking sheet in a Darcy–Forchheimer porous medium with second-order velocity slip

Waves in Random and Complex Media

Research paper thumbnail of Three-Dimensional Radiative Flow of Hybrid Nanofluid Past a Shrinking Plate with Suction

Journal of Advanced Research in Fluid Mechanics and Thermal Sciences

Hybrid nanofluid has been widely used in various heat transfer applications especially as the hea... more Hybrid nanofluid has been widely used in various heat transfer applications especially as the heat exchanger due to the great thermal conductivity compared to the conventional fluid. However, numerous investigations should still be carried out to properly understand its properties. Hence, in this study, a three-dimensional radiative flow of hybrid Cu-Al2O3/water nanofluid past a permeable shrinking plate is numerically analyzed. The boundary layer including the energy equations are reduced to a system of ordinary differential equations using the similarity transformations and are then solved numerically by using the bvp4c solver in MATLAB. The application of suction through the permeable plate is necessary in aiding the fluid motion past the shrinking surface. Dual solutions are also observable, hence the stability analysis is conducted to mathematically validate the real solution. The enhancement of copper volumetric concentration in the hybrid nanofluid is capable in decelerating ...

Research paper thumbnail of Marangoni hybrid nanofluid flow over a permeable infinite disk embedded in a porous medium

International Communications in Heat and Mass Transfer

Abstract The importance of porous medium and hybrid nanofluid in the augmentation of heat transfe... more Abstract The importance of porous medium and hybrid nanofluid in the augmentation of heat transfer process has been realized by the researchers. Hence, a numerical boundary layer exploration towards Marangoni hybrid nanofluid flow over a permeable infinite disk placed in a porous medium is carried out. 1% volume fraction of alumina is hybridized with (0.01 − 1)% volume fraction of copper in the water. The solver in Matlab software (bvp4c) is applied to enumerate the solutions. The non-unique (dual) solutions are discoverable for the shrinking disk and only the first solution is real. The upsurges of copper volume fraction, porosity and suction parameters enable the heat transfer rate to enhance and decelerate the boundary layer bifurcation at the shrinking disk.

Research paper thumbnail of MHD mixed convection flow of a hybrid nanofluid past a permeable vertical flat plate with thermal radiation effect

Alexandria Engineering Journal

Abstract The magnetohydrodynamic (MHD) radiative flow of a hybrid alumina-copper/water nanofluid ... more Abstract The magnetohydrodynamic (MHD) radiative flow of a hybrid alumina-copper/water nanofluid past a permeable vertical plate with mixed convection is the focal interest in this present work. Dissimilar to the traditional nanofluid model that considers only one type of nanoparticles, we consider the hybridization of two types of nanoparticles in this work which are alumina and copper. The governing flow and heat transfer equations are simplified to the ordinary differential equations (ODEs) with the adaptation of conventional similarity transformations which are then evaluated by the bvp4c solver (MATLAB) to generate the numerical solutions. The solutions are generated and illustrated in the form of graph to be easily observed. Although dual solutions are obtained in this study, only one solution is determined to be stable. By reducing the concentration volume of copper and increasing the magnetic and radiation parameters, the boundary layer separation can be hindered. With the occurrence of opposing flow due to the mixed convection parameter, the heat transfer can be enhanced when the concentration volume of copper is being reduced and when the magnetic and radiation parameters are being proliferated.

Research paper thumbnail of Mixed convection of a three-dimensional stagnation point flow on a vertical plate with surface slip in a hybrid nanofluid

Chinese Journal of Physics

Abstract Hybrid nanofluid has become one of the major interest topics among researchers nowadays ... more Abstract Hybrid nanofluid has become one of the major interest topics among researchers nowadays due to its significant impact in myriad applications. This paper modelled and explored the properties of flow and heat transfer of mixed convection stagnation point flow for hybrid nanofluid (alumina-copper/water) on a vertical plate with slips and suction. By using the method of similarity transformation, the governing set of partial differential equations (PDEs) are transformed into ordinary differential equations (ODEs). These derived equations are then evaluated numerically by adopting the bvp4c function that is available in Matlab software. In the presence of slips together with the opposing flow of mixed convection, the local Nusselt number (heat transfer rate) can be augmented by increasing the solid volume fraction of copper. The surge of 0.5% of copper volume fraction can accelerate the heat transfer rate by approximately 1.3% in this present analysis within the specified value of slips, mixed convection, and suction. The stability analysis is conducted due to the existence of dual solutions and only the first solution is stable for practical application.

Research paper thumbnail of Flow and heat transfer of hybrid nanofluid induced by an exponentially stretching/shrinking curved surface

Case Studies in Thermal Engineering

The efficient performance of heat transfer fluid in terms of thermal conductivity plays a signifi... more The efficient performance of heat transfer fluid in terms of thermal conductivity plays a significant role in thermal engineering activities. In this work, the flow of boundary layer and heat transfer of hybrid nanofluid induced by an exponentially permeable stretching/shrinking curved surface is modelled and scrutinized numerically. Facilitated by bvp4c function, the ordinary differential equations are being solved. The implications of some intended parameters towards the physical quantities are plotted, while the comparison of results for the validation purpose is also tabulated. We found out that the boundary layer separation is deferred as copper volume fraction and curvature parameters increased. The stability analysis for the flow is conducted as the dual solutions are visible. The first (second) solution of the hybrid nanofluid flow is observed to be stable (unstable). For the physical solution, the increment in copper volume fraction leads to the accretion of the skin friction coefficient at the shrinking surface but has reduced the local Nusselt number. The presence of hybrid nanofluid has enhanced the velocity and temperature profiles. Generally, this study provides the initial prediction for the scientist and engineers in controlling the parameters to achieve the optimum desires for the related practical applications.

Research paper thumbnail of MHD hybrid nanofluid flow with convective heat transfer over a permeable stretching/shrinking surface with radiation

International Journal of Numerical Methods for Heat & Fluid Flow

Purpose The purpose of this paper is to numerically investigate the hybrid nanofluid flow with th... more Purpose The purpose of this paper is to numerically investigate the hybrid nanofluid flow with the imposition of magnetohydrodynamic (MHD) and radiation effects alongside the convective boundary conditions over a permeable stretching/shrinking surface. Design/methodology/approach The mathematical model is formulated in the form of partial differential equations (PDEs) and are then transformed into the form of ordinary differential equations (ODEs) by using the similarity variables. The deriving ODEs are solved numerically by using the bvp4c solver in MATLAB software. Stability analysis also has been performed to determine the stable solution among the dual solutions obtain. For method validation purposes, a comparison of numerical results has been made with the previous studies. Findings The flow and the heat transfer of the fluid at the boundary layer are described through the plot of the velocity profile, temperature profile, skin friction coefficient and local Nusselt number that...

Research paper thumbnail of MHD Hybrid Cu-Al2O3/ Water Nanofluid Flow with Thermal Radiation and Partial Slip Past a Permeable Stretching Surface: Analytical Solution

Journal of Nano Research

The influence of velocity slip and thermal radiation effects on the magnetohydrodynamic hybrid Cu... more The influence of velocity slip and thermal radiation effects on the magnetohydrodynamic hybrid Cu-Al2O3/water nanofluid flow over a permeable stretching sheet is reported in this paper. The similarity transformation is adopted to reduce the partial differential equations to the ordinary differential equations. Exact analytical method is implemented to solve the problem. Maple program is used to facilitate the calculation process. The new additional effects which are the velocity slip and thermal radiation effects are considered towards the model to scrutinize the impacts. The effects of various parameters towards the velocity and temperature profiles are demonstrated through graphs, meanwhile the skin friction coefficient and the local Nusselt number are exhibited through the tabulation of data. The existence of velocity slip reduced the velocity profile but enhanced the temperature profile. The thermal radiation effect has increased the temperature profile. The heat transfer rate a...

Research paper thumbnail of Flow and heat transfer of hybrid nanofluid over a permeable shrinking cylinder with Joule heating: A comparative analysis

Alexandria Engineering Journal

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Research paper thumbnail of Effect of suction on the stagnation point flow of hybrid nanofluid toward a permeable and vertical Riga plate

Heat Transfer

2.1 Prenatal human craniofacial growth and devel opment. 2.2, Prenatal forelimb (arm) growth and ... more 2.1 Prenatal human craniofacial growth and devel opment. 2.2, Prenatal forelimb (arm) growth and deveìopment in the human. CI.IAPTER IiI. NO RMAL RODENT PRENATAL GROI,,TH AND DEVEL(jPMENT OF THE CRANiO FACIAL COI'{PLTX AND FORTLIMB. CHAPTIR IV. CHAPTER V. 3.1 Prenatal rodent craniofacial growth and devel opment. 3.2 Fetal rat mandjbular growth and developmr:nt' 3. 3 Feta.l rat I irnb growth and devel opment. 3.4 T*nrporal comparisons in development betleen man and rat. PATHOGTNiSIS OF ÛRANI()FACIAL MALFO}ìi'lATIONS l^J0Ui'iD HL.

Research paper thumbnail of Hybrid Nanofluid Slip Flow over an Exponentially Stretching/Shrinking Permeable Sheet with Heat Generation

Mathematics

An investigation has been done on the hybrid nanofluid slip flow in the existence of heat generat... more An investigation has been done on the hybrid nanofluid slip flow in the existence of heat generation over an exponentially stretching/shrinking permeable sheet. Hybridization of alumina and copper with water as the base fluid is considered. The mathematical model is simplified through the similarity transformation. A numerical solver named bvp4c in Matlab software is utilized to facilitate the problem-solving process and dual solutions are attained. The influences of several pertinent parameters on the main physical quantities of interest and the profiles are scrutinized and presented in the form of graphs. Through the stability analysis, only the first solution is considered as the physical solution. As such, the findings conclude that the upsurges of volume fraction on the copper nanoparticle could enhance the skin friction coefficient and the local Nusselt number.