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Darcy-Forchheimer mangetized flow based on differential type nanoliquid capturing Ohmic dissipation effects

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Propulsion and Power Research 2023年第3期12卷 443-455页

作者： m.Waqas Yunjie Xu m.nasir md mottahir Alam Amjad Ali Pasha Kashif Irshad Bandar m.Fadhl m.S.Kausar NUTECH School of Applied Science and Humanities National University of TechnologyIslamabad 44000Pakistan Department of mechanical Engineeing Lebanese American UniversityBeirutLebanon School of Engineering Huzhou UniversityHuzhou 313000China Faculty of Informatics and Computing University Sultan Zainal AbidinBesut Campus22200 BesutTereng-ganuMalaysia Department of Electrical and Computer Engineering King Abdulaziz UniversityJeddah 21589Saudi Arabia Aerospace Engineering Department King Abdulaziz UniversityJeddah 21589Saudi Arabia Interdisciplinary Research Centre for Renewable Energy and Power System(IRC-REPS) Research InstituteKing Fahd University of Petroleum and Minerals(KFUPM)Dhahran 31261Saudi Arabia mechanical Engineering Department College of Engineering and Islamic ArchitectureUmm Al-Qura UniversityP.O.Box 5555Makkah 21955Saudi Arabia

Hydromagnetic nanoliquid establish an extraordinary category of nanoliquids that unveil both liquid and magnetic *** interest in the utilization of hydromagnetic nanoliquids as a heat transporting medium stem from a likelihood of regulating its flow along with heat transportation process subjected to an externally imposed magnetic *** analysis reports the hydromagnetic nanoliquid impact on differential type(second-grade)liquid from a convectively heated extending *** well-known Darcy-Forchheimer aspect capturing porosity characteristics is introduced for nonlinear *** conditions elaborating heat-mass transportation effect are *** addition,Ohmic dissipation and suction/injection aspects are also a part of this *** analysis is done by implementing the basic relations of fluid *** modeled physical problem is simplified through order *** resulting systems(partial differential expressions)are rendered to the ordinary ones by utilizing the apposite *** solutions are constructed employing homotopy *** and numeric result are addressed comprehensively to elaborate the nature of sundry parameters against physical *** velocity profile is suppressed with increasing Hartmann number(magnetic parameter)whereas it is enhanced with increment in material parameter(second-grade).With the elevation in thermophoresis parameter,temperature and concentration of nanoparticles are accelerated.

关键词： Darcy-Forchheimer magnetized flow Differential type nanoliquid Ohimc dissipation Robin conditions Homotopy algorithm

Cannabis use history is associated with increased prevalence of ascites among patients with nonalcoholic fatty liver disease:A nationwide analysis

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World Journal of Hepatology 2020年第11期12卷 993-1003页

作者： Catherine J Choi Stanley H Weiss Umair m nasir Nikolaos T Pyrsopoulos Department of medicine Rutgers New Jersey Medical SchoolNewarkNJ 07101United States Department of medicine Biostatistics and EpidemiologyRutgers New Jersey Medical SchoolNewarkNJ 07103United States Division of Gastroenterology and Hepatology Department of MedicineRutgers-New Jersey Medical SchoolNewarkNJ 07103United States

BACKGROUND Recent studies have revealed the endocannabinoid system as a potential therapeutic target in the management of nonalcoholic fatty liver disease(NAFLD).Cannabis use is associated with reduced risk for NAFLD,we hypothesized that cannabis use would be associated with less liver-related clinical complications in patients with *** To assess the effects of cannabis use on liver-related clinical outcomes in hospitalized patients with *** We performed a retrospective matched cohort study based on querying the 2014 National Inpatient Sample(NIS)for hospitalizations of adults with a diagnosis of *** NIS database is publicly available and the largest all-payer inpatient database in the United *** patients with cannabis use were selected as cases and those without cannabis were selected as ***-control matching at a ratio of one case to two controls was performed based on sex,age,race,and *** liver-related outcomes such as portal hypertension,ascites,varices and variceal bleeding,and cirrhosis were compared between the *** A total of 49911 weighed hospitalizations with a diagnosis of NAFLD were *** these,3820 cases were selected as the cannabis group,and 7625 noncannabis cases were matched as *** with cannabis use had a higher prevalence of ascites(4.5%vs 3.6%),with and without cannabis use,P=*** prevalence of portal hypertension(2.1%vs 2.2%),varices and variceal bleeding(1.3%vs 1.7%),and cirrhosis(3.7%vs 3.6%)was not different between the groups,with and without cannabis use,all P>***,race/ethnicity other than White,Black,Asian,Pacific Islander or Native American,and higher comorbidity score were independent risk factors for ascites in the cannabis *** non-cannabis users,obesity and hyperlipidemia were independent protective factors against ascites while older age,Native American and higher comorbidity index were independent risk factors for ***

关键词： Nonalcoholic fatty liver disease Fatty liver Cannabis marijuana use Liver diseases Hospitalization

Evaluation of Corrosion Product Activity in a Typical PWR with Extended Cycles and Flow Rate Perturbations

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World Journal of Nuclear Science and Technology 2017年第1期7卷 24-34页

作者： Rubina nasir Sikander m. mirza nasir m. mirza Department of Physics Air University Islamabad Pakistan Department of Physics & Applied mathematics Pakistan Institute of Engineering & Applied Sciences Islamabad Pakistan

Effect of flow rate perturbations has been studied using the modified computer program CPAIR-P for time dependent corrosion rates in Pressurized Water Reactors (PWRs) having extended cycles. In these simulations, a decrease in the corresponding saturation values of corrosion product activity (CPA) is observed for higher pH values. Comparison of CPA’s behavior has been done for constant flow-rate case as well as for transients with elevated 10B levels (~40%) in dissolved boric acid in coolant in two operating cycles. When the flow rate is decreased in the first cycle, the saturation value of CPA attains new higher values. Also, in the second operating cycle, the saturation values are about 12% higher when compared with the values in the first cycle.

关键词： PWRs Corrosion Products Enriched Boric Acid Extended Cycles Flow Rate Perturbations

Evolution of Dissipative Anisotropic Expansion-Free Axial Fluids

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Communications in Theoretical Physics 2015年第8期64卷 139-144页

作者： m.Sharif Zunaira nasir Department of mathematics University of the Punjab Quaid-i-Azam Campus

A general study of non-static restricted class of axial system with anisotropic dissipative expansion-free fluid under geodesic condition is carried out. It is found that expansion-free model must be dissipative under geodesic condition to preserve axial symmetry. We also investigate this system without geodesic condition. Finally, the role of dissipation is explored via transport equation.

关键词： general relativity dissipative systems analytical

Tailoring the optical and magnetic properties of La-Bam hexaferrites by Ni substitution

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Chinese Physics B 2022年第2期31卷 570-575页

作者： Hafiz T.Ali mRamzan m Imran Arshad Nicola A.morley m.Hassan Abbas mohammad Yusuf Atta Ur Rehman Khalid mahmood Adnan Ali nasir Amin mAjaz-un-Nabi Department of mechanical Engineering College of EngineeringTaif UniversityTaif 21944Saudi Arabia Department of Physics Government College UniversityFaisalabadPakistan Department of materials Science and Engineering University of SheffieldSir Robert Hadfield BuildingMapping St.SheffieldS13JDUK Department of Clinical Pharmacy College of PharmacyTaif UniversityTaif 21944Saudi Arabia

We investigate the impact of Ni insertion on the structural,optical,and magnetic properties of Ba_(0.8)La_(0.2)Fe_(12-x)Ni_(x)O_(19)hexaferrites(Ni substituted La-Bam hexaferrites).Samples were prepared using the conventional co-precipitation method and sintered at 1000℃for 4 hours to assist the crystallization *** analysis of the structure of the samples was carried out using an x-ray diffraction(XRD)*** m-type hexagonal structure of all the samples was confirmed using XRD *** lattice parameters a and c were found to be in the ranges of 5.8925±0.001 nm–5.8952±0.001 nm and 23.2123±0.001 nm–23.2219±0.001 nm,*** m-type hexagonal nature of the prepared samples was also indicated by the presence of corresponding FT-IR bands and Raman modes in the FT-IR and Raman spectra,*** results confirmed the successful synthesis of the samples according to the required stoichiometric ratio.A UV-vis spectrometer was used to record the absorption spectra of the prepared samples in the wavelength range of 200 nm–1100 *** optical energy bandgap of the samples was found to be in the range of 1.21 eV–3.39 *** m–H loops of the samples were measured at room temperature at an applied magnetic field range of 0 kOe–60 kOe.A high saturation magnetization of 99.92 emu/g was recorded in the sample with x=0 at a microwave operating frequency of 22.2 *** high value of saturation magnetization is due to the substitution of La3+ions at the spin-up(12k,2a,and 2b)*** Ni substitution is proven to be a potential candidate for the tuning of the optical and magnetic parameters of m-type ***,we suggest that the prepared samples are suitable for use in magneto-optic applications.

关键词： m-type hexaferrite nanostructured materials magnetic properties optical properties

Strategies to improve aerobic granular sludge stability and nitrogen removal based on feeding mode and substrate

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Journal of Environmental Sciences 2019年第10期31卷 144-154页

作者： Quan Yuan Hui Gong Hao Xi Heng Xu Zhengyu Jin nasir Ali Kaijun Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnuironmentTsinghua Uniuersity

A systemic strategy was proposed to improve aerobic granular sludge(AGS)stability and nitrogen(N)removal efficiency by optimizing feeding mode and substrate aiming at complicated wastewater *** functional groups at the genus level identified by high-throughput sequencing were evaluated as *** results showed that anaerobic feeding mode and acetate promoted the compact AGS formation with excellent total nitrogen(TN)removal efficiency(averaging 91.7%±4.1%)at various dissolved oxygen *** the aerobic feeding mode led to a loose AGS structure with a vulnerable anaerobic core and poor TN removal efficiency(averaging58.8%±7.4%).Simultaneous nitrification and denitrification process played the dominant role in N removal in compact AGS over the alternating nitrification and denitrification ***-concentration glucose undermined feast-famine condition with filamentous bacteria growth out of granule and decreased TN removal efficiency to 67.3%±15.2%.Lower food to microorganism ratio may result in a lower N removal rate attributed to the sharply increased biomass concentration fed by ***-oxidizing bacteria,nitrite-oxidizing bacteria,denitrifying bacteria,and denitrifying phosphorus accumulation organisms enriched during AGS granulation also contributed to the efficient N *** proposed strategy provided insights into the relationship between various factors and stable AGS formation,and systemic operation methods for various complicated wastewater treatment.

关键词： Aerobic granular sludge Feeding mode Substrate N removal Stability

Scalability of biomass-derived graphene derivative materials as viable anode electrode for a commercialized microbial fuel cell: A systematic review

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Chinese Journal of Chemical Engineering 2023年第3期55卷 277-292页

作者： mustapha Omenesa Idris Claudia Guerrero-Barajas Hyun-Chul Kim Asim Ali Yaqoob mohamad nasir mohamad Ibrahim School of Chemical Sciences Universiti Sains Malaysia11800 PenangMalaysia Department of Pure and Industrial Chemistry Kogi State UniversityP.M.B 1008 AnyigbaKogi StateNigeria Laboratorio de Biotecnologia Ambiental Departamento de BioprocesosUnidad Profesional Interdisciplinaria de BiotecnologiaInstituto Politecnico NacionalAv.Acueducto s/nCol.Barrio La Laguna Ticoman07340 Mexico CityMexico Research Institute for Advanced Industrial Technology College of Science and TechnologyKorea UniversitySejong 30019Republic of Korea

microbial fuel cell(mFC) is an advanced bioelectrochemical technique that can utilize biomass materials in the process of simultaneously generating electricity and biodegrading or bio transforming toxic pollutants from wastewater. The overall performance of the system is largely dependent on the efficiency of the anode electrode to enhance electron transportation. Furthermore, the anode electrode has a significant impact on the overall cost of mFC setup. Hence, the need to explore research focused towards developing cost-effective material as anode in mFC. This material must also have favourable properties for electron transportation. Graphene oxide(GO) derivatives and its modification with nanomaterials have been identified as a viable anode material. Herein, we discussed an economically effective strategy for the synthesis of graphene derivatives from waste biomass materials and its subsequent fabrication into anode electrode for mFC applications. This review article offers a promising approach towards replacing commercial graphene materials with biomass-derived graphene derivatives in a view to achieve a sustainable and commercialized mFC.

关键词： microbial fuel cell Biomass Anode fabrication Catalyst Design Cost-effective performance

Construction of S-scheme mnO_(2)@CdS heterojunction with core–shell structure as H_(2)-production photocatalyst

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Rare metals 2021年第9期40卷 2381-2391页

作者： Syed Zulfiqar Song Liu nasir Rahman Hua Tang Sufaid Shah Xiao-Hui Yu Qin-Qin Liu School of material Science and Engineering Jiangsu UniversityZhenjiang 212013China Department of Physics Abdul Wali Khan UniversityMardan KP 23200Pakistan

Artificial photosynthesis is deemed as an efficient protocol for transforming abundant solar energy into valuable fuel. In this paper, the well-defined one-dimensional(1D) core–shell mnO_(2)@CdS hybrids were constructed by employing mnO_(2) nanotubes and CdS nanoparticles as nano-building blocks via a chemical coprecipitation route. The rationally designed core–shell structure provided an intimate heterojunction interface between the CdS shell and mnO_(2) core. All the mnO_(2)@CdS core–shell nanocomposites possess higher H_(2) evolution rate through visible light irradiation contrary to pristine CdS, and the optimal mnO_(2)@CdS hybrid exhibits the utmost H_(2) evolution rate of 3.94 mmol·g^(-1)·h^(-1), which is2.8-fold higher compared with that of CdS. Appertaining to XPS and mott-Schottky(m-S) analysis, such enhanced photocatalytic H_(2) generation of mnO_(2)@CdS heterojunction was ascribed to an S-scheme mechanism, which suppressed the charge recombination along with a fast detachment of electron–hole pairs(e^(-)–h^(+)) and significantly improved the severance of carriers, thus improved H_(2) evolution performance. These findings envision a new insight into the development of S-scheme heterostructure for photocatalytic H_(2) generation.

关键词： CdS mnO_(2) Photocatalytic H_(2)evolution Sscheme Intimate interface

Performance Evaluation of a DS-CDmA System in a Rayleigh Fading Environment

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World Journal of Engineering and Technology 2016年第1期4卷 1-9页

作者： m. A. Rahman m. m. Alam md. Khalid Hossain md. Khairul Islam khan m. nasir Uddin md. Shahinuzzaman Department of Applied Physics Electronics & Communication Engineering Islamic University Kushtia Bangladesh Institute of Electronics Atomic Energy Research Establishment Savar Bangladesh

This work represents the performance evaluation of DS-CDmA in a Rayleigh fading environment. Performance analysis was carried out for a DS-CDmA system to evaluate the signal-to-noise ratio (SNR), signal-to-interference ratio (SIR) and bit error rate (BER) for different modulation schemes like ASK, PSK and FSK. Results were evaluated at different data rates and were presented in terms of SNR, SIR and BER. Computer simulation was also carried out by using matlab to evaluate the signal waveforms with and without addition white Gaussian noise (AWGN). Butterworth filtered waveform was given to get better signal quality. Decoded output waveforms were also evaluated to confirm the simulation.

关键词： DS-CDmA Rayleigh Fading Performance Analysis SNR BER ASK PSK FSK mATLAB AWGN