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Confinement effectiveness of Timoshenko and Euler Bernoulli theories on buckling of microfilaments
Taj, Muhammad,Khadimallah, Mohamed A.,Hussain, Muzamal,Mahmood, Shaid,Safeer, Muhammad,Al Naim, Abdullah F.,Ahmad, Manzoor Techno-Press 2021 Advances in concrete construction Vol.11 No.1
Rice Husk Ash (RHA) geopolymer paste activated by sodium aluminate were characterized by X-ray diffractogram (XRD), scanning electron microscope (SEM), energy dispersion X-Ray analysis (EDAX)and fourier transform infrared spectroscopy (FTIR). Five series of RHA geopolymer specimens were prepared by varying the Si/Al ratio as 1.5, 2.0, 2.5, 3.0 and 3.5. The paper focuses on the correlation of microstructure with hardened state parameters like bulk density, apparent porosity, sorptivity, water absorption and compressive strength. XRD analysis peaks indicates quartz, cristobalite and gibbsite for raw RHA and new peaks corresponding to Zeolite A in geopolymer specimens. In general, SEM micrographs show interconnected pores and loosely packed geopolymer matrix except for specimens made with Si/Al of 2.0 which exhibited comparatively better matrix. Incorporation of Al from sodium aluminate were confirmed with the stretching and bending vibration of Si-O-Si and O-Si-O observations from the FTIR analysis of geopolymer specimen. The dense microstructure of SA2.0 correlate into better performance in terms of 28 days maximum compressive strength of 16.96 MPa and minimum for porosity, absorption and sorptivity among the specimens. However, due to the higher water demand to make the paste workable, the value of porosity, absorption and sorptivity were reportedly higher as compared with other geopolymer systems. Correlation regression equations were proposed to validate the interrelation between physical parameters and mechanical strength. RHA geopolymer shows comparatively lower compressive strength as compared to Fly ash geopolymer.
Vibration of SWCNTs: Consistency and behavior of polynomial law index with Galerkin's model
Khadimallah, Mohamed A.,Hussain, Muzamal,Khedher, Khaled Mohamed,Bouzgarrou, Souhail Mohamed,Al Naim, Abdullah F.,Naeem, Muhammad Nawaz,Taj, Muhammad,Iqbal, Zafar,Tounsi, Abdelouahed Techno-Press 2020 Advances in nano research Vol.9 No.4
In this article, vibration attributes of single walled carbon nanotubes based on Galerkin's method have been investigated. The influence of power law index subjected to different end supports has been overtly examined. Application of the Hamilton's variational principal leads to the formation of partial differential equations. The effects of different physical and material parameters on the fundamental frequencies are investigated for armchair and zigzag carbon nanotubes with clamped-clamped, simply supported and clamped-free boundary conditions. By using volume fraction for power law index, the fundamental natural frequency spectra for two forms of Single-Walled Carbon Nanotubes (SWCNTs) are calculated. The influence of frequencies against length-to-diameter ratios with varying power law index are investigated in detail for these tubes. MATLAB software package has been utilized for extracting tube frequency spectra. The obtained results are confirmed by comparing with available literature.
Interaction of casson nanofluid with Brownian motion: Temperature profile with shooting method
Iqbal, Waheed,Jalil, Mudassar,Khadimallah, Mohamed A.,Hussain, Muzamal,Naeem, Muhammad N.,Al Naim, Abdullah F.,Tounsi, Abdelouahed Techno-Press 2021 Advances in nano research Vol.10 No.4
In present study, the numerical investigations are carried out for effects of suction and blowing on boundary layer slip flow of casson nano fluid along permeable stretching cylinder in an exponential manner. The modeled PDEs are changed into nonlinear ODEs through appropriate nonlinear transformations. Change in physical quantities like friction coefficient, Nusselt and Sherwood numbers with variation of the aforementioned parameters are also examined and their numerical values are listed in the form of tables. Effects of Reynold number, suction parameter, Prandtl number, Lewis number, Brownian motion parameter and thermophoresis parameter are seen graphically with temperature profile.
Energy effects on MHD flow of Eyring's nanofluid containing motile microorganism
Sharif, Humaira,Naeem, Muhammad N.,Khadimallah, Mohamed A.,Ayed, Hamdi,Bouzgarrou, Souhail Mohamed,Al Naim, Abdullah F.,Hussain, Sajjad,Hussain, Muzamal,Iqbal, Zafar,Tounsi, Abdelouahed Techno-Press 2020 Advances in concrete construction Vol.10 No.4
The impulse of this paper is to examine the influence of unsteady flow comprising of Eyring-Powell nanofluid over a stretched surface. This work aims to explore efficient transfer of heat in Eyring-Powell nanofluid with bio-convection. Nanofluids possess significant features that have aroused various investigators because of their utilization in industrial and nanotechnology. The influence of including motile microorganism is to stabilize the nanoparticle suspensions develop by the mixed influence of magnetic field and buoyancy force. This research paper reveals the detailed information about the linearly compressed Magnetohydrodynamics boundary layer flux of two dimensional Eyring-Powell nanofluid through disposed surface area due to the existence of microorganism with inclusion the influence of non- linear thermal radiation, energy activation and bio-convection. The liquid is likely to allow conduction and thickness of the liquid is supposed to show variation exponentially. By using appropriate similarity type transforms, the nonlinear PDE's are converted into dimensionless ODE's. The results of ODE's are finally concluded by employing (HAM) Homotopy Analysis approach. The influence of relevant parameters on concentration, temperature, velocity and motile microorganism density are studied by the use of graphs and tables. We acquire skin friction, local Nusselt and motil microorganism number for various parameters.
An innovative system for novel vibration of rotating FG shell with combination of fraction laws
Khadimallah, Mohamed Amine,Hussain, Muzamal,Al-Thobiani, Faisal,Elbahar, Mohamed,Al Naim, Abdullah F.,Elimame, Elaloui,Harbaoui, Imene,Tounsi, Abdelouahed Techno-Press 2021 Advances in concrete construction Vol.12 No.2
A new model with the combination of the Galerkin's technique have been developed for functionally graded cylindrical shell. For the vibrations of rotating cylindrical shells, three volume fraction laws i.e., polynomial, trigonometric and exponential are combined mathematically. The obtained results show that by increasing length-to-radius and height-to-radius ratios, the backward and forward frequency value decreases and increases, respectively. Moreover, on increasing the rotating speed, the backward frequencies increases and forward frequencies decreases. The results generated furnish the evidence regarding applicability of present model with clamped-clamped boundary conditions and also verified by earlier published literature.
Waheed Iqbal,Mudassar Jalil,Mohamed A. Khadimallah,Muzamal Hussain,Muhammad N. Naeem,Abdullah F. Al Naim,S.R. Mahmoud,Abdelouahed Tounsi 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.38 No.1
The Runge-Kutta method of 6th-order has been employed in this paper to analyze the flow of Casson nanofluid along permeable exponentially stretching cylinder. The modeled PDEs are changed into nonlinear ODEs through appropriate nonlinear transformations. The aim of the paper is to investigate the effects of different parameters such as Casson fluid parameter, slip parameter, suction parameter, Prandtl number, Lewis number, Brownian motion parameter, and thermophoresis parameter, with the variation of mass concentration profile. Numerical results are attained using a renowned numerical scheme shooting technique and for the authenticity of present methodlogy, the results are verified with earlier open text.