American Journal of Engineering Research and Reviews

Investigation of forced convective heat transfer in nanofluids

Research Article of American Journal of Engineering Research and Reviews Investigation of forced convective heat transfer in nanofluids Zain F. Abu Shaeer1 and Mofreh H. Hamed1,2 1Higher Institute of Engineering and Technology, HIET Kafrelsheikh, Egypt 1,2 Faculty of Engineering, Kafrelsheikh University, Egypt The present paper concerns a theoretical study of heat transfer of the laminar two dimensional flows of various nanofluids taking into account the dissipation due to viscous term past a 2-D flat plate had a different temperatures. The steady incompressible flow equations were used and transformed to a nonlinear Ordinary Differential Equation (ODE). These equations were solved numerically using implicit finite difference method. Three types of nanoparticles in the base flow of water were considered. The symbolic software Mathematica was used in the present study. Different types of nanoparticles, different values of, nanoparticle volume fraction, Eckart and Prandtl number were tested and analyzed at different wall temperature. The effect of these parameters on the flow behaviour, the local skin friction coefficient, Nusselt number, the velocity and the temperature profiles were presented and investigated. It is concluded that these parameters affect the fluid flow behaviour and heat transfer parameters especially nanoparticle concentration. The presence of nanoparticles showed an enhancement in the heat transfer rate moreover its type has a significant effect on heat transfer enhancement. Keywords: Nanofluid and flat plate, heat transfer; viscous dissipation, wall temperature ...


Review Article of American Journal of Engineering Research and Reviews DETECTION AND REMOVAL OF ARTIFACTS FROM EEG RECORDS- A REVIEW SAGAR S. MOTDHARE and ARUN DEV DHAR DWIVEDI Department of Electronics Engineering, Poornima University, Jaipur. Electroencephalogram or EEG is a trace of Brain action from different locales of the cerebrum. It is the electrical movement and activity determined by putting the electrode terminals on the scalp. Artifacts are unnecessary noise signals in an EEG record. These noise in recording EEG sham a major mortification for EEG interpretation and disposal. Categorization of artifacts depends on source of its creation similar to Physiological artifacts along with Exterior artifacts. Recognition of artifacts, identification of artifacts as well as eradication of artifacts is a significant procedure to diminish the possibility of false impression of EEG not only for clinical but also for non-clinical fields. The majority of recording convention. There are various strategies for artifact removal which incorporates manual and automatic techniques. Morphology and Electrical distinctiveness of artifacts can show the way to fake elucidation that is intolerable in support of clinical as well as non clinical utilization. Thus artifacts in EEG signals must be removed or minimized before further interpretation. The presented paper describes a review on detection, classification and removal/ minimization of the recorded EEG signal artifacts. Keywords: EEG Signal, Artifacts, Artifact Detection, Artifact Removal ...


Research Article of American Journal of Engineering Research and Reviews COMPARATIVE ANALYSIS OF CONTROLLED HEALTHY AND MCI PATIENTS USING EEG STATISTICS PARAG PURANIK1, SANTOSH AGRAHARI2, ASHISH PANAT3 1Research Scholar, Department of Electrical and Electronics Engineering, Poornima University, Jaipur; 2Associate Professor, Department of Electrical and Electronics Engineering, Poornima University, Jaipur; 3Dean, Innovation and Incubation, SNDT Women’s University, Mumbai This paper describes the statistical analysis of EEG signals. EEG examination is carried out and compared between controlled healthy and Mild cognitive impairment (MCI) patients which may further develop dementia or Alzheimer disease. The statistical techniques provide the comparative analysis of EEG signal. The correct evaluation of EEG provides the extraction of valuable information which is important clinically. Also, extracting significant features from EEG is an important task for classification between various patients. The analysis of EEG data provides correct frequency rhythms. The relative Power spectral density values by Auto Regressive-Burg process cleared that; associated with the control group, the relative PSD is improved in the theta rhythmic range while expressively reduced in the alpha-2 rhythmic range. Keywords: EEG analysis, Mild cogbitive impairment (MCI), EEG statistics, Power spectral Density (PSD), coherence analysis ...

Leakage reduction in water supply system through the adjustment of its hydraulic efficiency

Research Article of American Journal of Engineering Research and Reviews Leakage reduction in water supply system through the adjustment of its hydraulic efficiency HAIDAR Hatem*, BARADA Ali**, HALAWANI Jalal*** * Associate Professor, Civil Engineering and Public Works Department, Lebanese University, Hadath Campus, Lebanon. ** PhD Student, Lebanese University, Ecole doctorale en science et Technonlogie, Hadath Campus, Baabda (Lebanon). Water & Environment Laboratory, Lebanese University, Tripoli, Lebanon, *** Professor, Director of Water & Environment Laboratory, Lebanese University, Tripoli, Lebanon The present paper provides a pilot example for water networks managers and operators intending to adjust the hydraulic condition of a pressurized water system to operations conditions with the objective to improve its efficiency. For this aim, a hydraulic modeling methodology has been applied and combined with site inspection, and field measurements. The selected water system operates under particular topographic and operational conditions and suffers from major problems making the system unable to deliver water with the designed volume to the regional reservoir. The system is studied under both steady and unsteady conditions. The study shows benefits of the proposed methodology in terms of water loss reduction which allows enhancing the hydraulic performance of the system. Consequently, the adjustment of a water system to fit with the real operations conditions has improved the hydraulic reliability and efficiency of the system. The novelty of this paper is two-fold. First, it gathers field measurements and hydraulic modeling. Second, it forecasts and measures the efficiency of proposed rehabilitation works by checking the performance of the water system. Therefore, the paper results can be useful to researchers in hydraulics who need an identification of relevant studies, as well as to practitioners interested in understanding the available methods, techniques and tools and their applicability level in real case studies. Keywords: Pressurized system, Water hammer, measurements, leakage, hydraulic ...

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American Journal of Engineering Research and Reviews