Progress in Canadian Mechanical Engineering. Volume 3最新文献

{"title":"Simulation of Bouncing Solid Particle in Oil: Spherical vs. Polyhedral Particle Shape Effect","authors":"F. Razavi, A. Komrakova, C. Lange","doi":"10.32393/CSME.2020.X04","DOIUrl":"https://doi.org/10.32393/CSME.2020.X04","url":null,"abstract":"To prepare for the simulation of sand filtration in heavy oil, the detailed flow of individual particles in oil is studied. Investigation of the motion of a bouncing solid particle toward the wall in a fluid helps understand the particle-fluid and particle-wall interactions in the numerical model. The numerical results get verified against experimental data through reporting Root Mean Square Error (RMSE). The particle distance-from-wall is measured. Although some numerical research has been carried out on spherical bouncing particle, there have been few numerical investigations into the effect of the non-spherical particles on the trajectory/distance-from-wall of the falling/bouncing particle toward the wall in a fluid. Accordingly, the specific aims of this work are: Considering the quiescent fluid of silicon oil in a tank made of glass, a steel sphere is falling in oil toward the bottom glass wall. The mass density of the steel sphere is ρ p = 7800 kg/m 3 . The Young’s modulus of elasticity E is 214 × 109 Pa and the Poisson’s ratio v is 0.3. The mass density of silicon oil is ρ f = 970 kg/m 3 and the dynamic viscosity is µ = 0.1 Pa.s (at T = 20° C). Size of the steel sphere, Re and St numbers are 0.0053 m, 30 and 55, respectively. The trajectory/distance-from-wall of the particle is affected by particle-fluid and particle-wall interactions. The particle and the interactions with fluid and wall will be investigated numerically in STAR-CCM+ using Coupled Computational Fluid Dynamics and Discrete Element Method (CFD-DEM). DEM simulations are of tracking individual particles’ trajectories, considering various forces on the particles caused by interaction with fluid, with other particles, and with walls. Also, simulate non-spherical particles. This work shows that the developed model predicts the trajectory/distance-from-wall of the bouncing spherical particle with a RSME equal or less than 0.1. Also, the trajectory/distance-from-wall of the polyhedral particle differs from the spherical particles, demonstrating that shape matters. Changes in the drag force due to changes in particle shape will be also investigated. Further work will apply the model findings to the study of particle filtration.","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134083319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linear Position-Based Visual Predictive Control","authors":"M. M. H. Fallah, F. Janabi-Sharifi","doi":"10.32393/csme.2020.1274","DOIUrl":"https://doi.org/10.32393/csme.2020.1274","url":null,"abstract":"Although position-based visual servoing (PBVS) scheme guarantees the global asymptotic stability and unlike the image-based visual servoing (IBVS), some issues such as image singularities and camera retreat problems do not emerge within the control procedure but, its sensitivity to camera calibration errors must be addressed. This paper presents a novel positionbased visual predictive control (PVPC) method based on the internal model control (IMC) scheme to not only overcome the issues caused by camera calibration errors, but also to handle the available constraints in the visual servoing procedure. In addition, the optimized control signal puts less pressure on the actuators while the camera goes through the smoother spatial trajectory. In order to verify the functionality and efficiency of the proposed approach, some simulation results are presented .","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125889854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance Evaluation of a Two-Phase Closed Thermosyphon Having a Converging-Diverging Pipe Body","authors":"C. Bliss, A. Tarokh","doi":"10.32393/csme.2020.116","DOIUrl":"https://doi.org/10.32393/csme.2020.116","url":null,"abstract":"The present study focuses on improving the heat transfer performance of a two-phase closed thermosyphon (TPCT) by altering the geometry of a typical straight pipe thermosyphon body to have a converging-diverging section. The flow path of the liquid-vapor fluid mixture is augmented with this new design to induce thermal boundary layer mixing thereby enhancing the convection heat transfer within the system during operation. A multiphase numerical simulation model has been developed to simulate the fluid phase change and wall temperature distribution of a two-phase closed thermosyphon. The Lee model is used to calculate mass transfer source terms during the condensation and evaporation phase change processes and the Volume of Fluid (VOF) method is employed to track liquid-vapor interface movement during the simulations. Wall temperature distributions as well as overall thermal resistance values are compared with experimental values available in the literature in order to validate the simulation model for a straight pipe geometry. Two additional model geometries are then used for comparative study where the converging-diverging (CD) section is positioned within the adiabatic section and condenser section respectively. The numerically simulated wall temperature distribution and overall thermal resistance results indicate that the most significant impact can be made when the CD section is positioned in the adiabatic section and condenser section exhibiting reduction of 1.7% and 3.4%, respectively, in overall thermal resistance. Keywords-Thermosyphon; Phase-change; Multiphase flow; Computational fluid dynamics; Numerical simulation;","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125347847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Passively Enhanced Natural Convection Heat Transfer via Swirl Effect","authors":"L. D. Liddo, D. Naylor","doi":"10.32393/csme.2020.50","DOIUrl":"https://doi.org/10.32393/csme.2020.50","url":null,"abstract":"A numerical and experimental study, in the preliminary stages, has been conducted examining the effect of swirling flow on the natural convective heat transfer rate from a flat, horizontal, heated, upward facing, isothermal circular disk surrounded by insulation.","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126729144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection and Mapping of Arsenic Contamination in Bangladesh","authors":"Paromita Basak, H. Rashid, F. M. Mohee, M. Freire-Gormaly","doi":"10.32393/csme.2020.1255","DOIUrl":"https://doi.org/10.32393/csme.2020.1255","url":null,"abstract":"— Arsenic contamination in the groundwater of Bangladesh is of major concern due to the high reliance on groundwater for drinking water, large levels of groundwater extraction for agricultural purposes and the impact of climate change depleting the groundwater table. Although the Sitakunda Distract was earlier considered to be free from Arsenic contamination, recent experimental data shows the Sitakunda District has high Arsenic concentrations. The objective of this work was to identify the Arsenic affected wells in the Sitakunda District, Chittagong, map them in QGIS mapping software and updated Bing imagery using GPS coordinates from GPS Devices and to explore the potential relationship between the present data with past data. The Sitakunda District region wells examined in this study determined the Arsenic concentration to be in the range of 100-500+ ppb which is much higher than the World Health Organization limits (10 ppb) and Bangladesh limit (50ppb). The generated maps in QGIS showed the randomly selected tested tubewells with satellite imagery and their corresponding elevation, yet no precise correlation between Arsenic contamination and land elevation was determined. The results of this study and corresponding satellite map has the potential to identify Arsenic contaminated tubewells for the community members. Future investigations will explore the development of suitable low-cost water treatment technologies to remove the Arsenic contamination.","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129182015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Survey of Advanced Dynamic Matrix Control Algorithms for Improved Performance","authors":"Edward Parrott, Brad Chevarie, K. Ellis, Josie Versloot, R. Dubay","doi":"10.32393/csme.2020.1140","DOIUrl":"https://doi.org/10.32393/csme.2020.1140","url":null,"abstract":"Model Predictive Controllers, specifically Dynamic Matrix Controllers (DMCs), have become widespread in industry. However, they have some drawbacks, particularly when it comes to their tuning and their application to non-linear systems. This paper explores several modifications to the canonical DMC algorithm which aim to improve its performance and applicability in these situations. The formulation of each modification is presented and contrasted to the canonical formulation, and then each is tested against the other in simulation on a variety of linear and non-linear systems.","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127755262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Simulation of Laminar Vortex-shedding Flow Around a very Slender and Rectangular Bluff Body","authors":"A. Etminan, A. Bodaghkhani, Y. Muzychka","doi":"10.32393/csme.2020.44","DOIUrl":"https://doi.org/10.32393/csme.2020.44","url":null,"abstract":"—In the present study, the numerical results of flow and heat transfer structure around a very slender bluff body with a rectangular cross-sectional area are investigated in detail. The Reynolds number is considered so low that the flow presumably is laminar. Reynolds number, Prandtl number, aspect ratio, and the angle of incidence are assumed to be 100, 0.71, 0.1, and 45 degrees respectively. A finite volume method using the SIMPLEC algorithm and non-staggered grid is employed for the simulation in the two-dimensional and incompressible flow regime. The studies of spatial resolution and grid independency are carried out as well. Furthermore, the instantaneous variations of flow parameters are provided and discussed thoroughly. The global quantities including pressure and viscous drag and lift coefficients, the Root Mean Square (RMS) of drag and lift, and Strouhal number are also computed. The simulations reveal that the angle of incidence of the bluff body relocates the stagnation point from the centre to a point at the one-fifth of the frontal side. An acceptable verification has been observed by making a comparison between the provided results and available data in the literature.","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128079272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constitutive Relation of Flexible Woven Composites Based on Neural Network","authors":"Gao Minjun, Meng Junhui, Li Moning, Ma Nuo","doi":"10.32393/csme.2020.52","DOIUrl":"https://doi.org/10.32393/csme.2020.52","url":null,"abstract":"Due to the advantages of light weight, low cost, foldable and flexible control, flexible inflatable structure has important application prospect in the field of aerospace. Airbags of inflatable structures are usually made of flexible fiber woven composites, which are laminated or heat sealed by load-bearing layer of woven fibers and other functional membrane layers. Study on the flexible fiber woven composites’ mechanical property is very important, but it’s greatly influenced by environmental parameters like temperature, which results to complex nonlinearity. However, there are many factors influencing the constitutive relation of flexible airbag materials, including Coefficient of friction between fiber yarns, yarn diameter, space, weaving way environmental temperature, loading velocity and other parameters. Therefore, in order to obtain accurate constitutive models of different kinds of airbag materials, a large number of experimental tests are usually required. In this paper, the neural network simulation is combined with the constitutive model construction of flexible airbag materials, a back propagation neural network based constitutive relation analytical method was proposed for the flexible fiber woven composites. The biaxial tensile test was carried out under different environmental parameters to obtain the coupling relationship between shear modulus and biaxial tensile modulus. The experimental results were taken as input variables of the neural network to construct an extended neural network model considering the shear effect and loading history effect. The complex constitutive relation of flexible fiber woven composites was completed by using the advantage of neural network in dealing with nonlinear problems. The constitutive relation obtained from the training was applied to the nonlinear finite element simulation analysis of the flexible inflatable aerostat’s deformation under different light conditions in one day. Compared with the experimental results, the prediction accuracy was greater than 0.99, which verified the validity of the constitutive model..","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"45 48","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113933914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Analysis Of Carbopol Gels Inside a Cubical Cavity Across Differentially Heated Plates","authors":"K. Jadhav, P. Rossi, I. Karimfazli","doi":"10.32393/csme.2020.1148","DOIUrl":"https://doi.org/10.32393/csme.2020.1148","url":null,"abstract":"—Viscoplastic fluids are the class of fluids with a yield stress that governs their ability to flow. This research deals with the effect of temperature difference applied across a viscoplastic fluid (carbopol gel) and studies the various flow regimes depending on the onset of the flow. Reasonable efforts have been made to estimate the experimental flow onset times and investigate the onset of the flow at different yield stress values. The idea behind the proposed research is to characterize the natural convection of yield stress fluids. The flow field characterization is carried out using a PIV system. The post processing is done using PIVlab, a useful add-on for MATLAB. In this paper, ∆ T refers to the temperature difference across the cavity. We investigated that noflow ∆ T is increased as yield stress increases. We also found that flow development is delayed with an increase in yield stress and decreases with increasing ∆ T for all carbopol concentrations.","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116294027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-Phase Slug Flow Correlations for Severe Slugging in Subsea Pipelines","authors":"L. Igbokwe, G. Naterer, S. Zendehboudi","doi":"10.32393/csme.2020.1175","DOIUrl":"https://doi.org/10.32393/csme.2020.1175","url":null,"abstract":"Slug flows in multiphase petroleum fluids may present substantial challenges to the economical and safe operation of equipment used for oil recovery, flow separation and stabilization. Two-phase slug flow parameters provide key information in the design of downstream separation installation, particularly in slug dominated flows. In this paper, a dimensionless analysis based on the Buckingham pi theorem will be used to develop and analyze new slug velocity correlations. The empirical model uses relevant dimensionless numbers including the Reynolds number, Bejan number, and the density ratio. The new model can be used in the selection of operating conditions and secondary recovery mechanisms. Over 5,000 data points were used for the analysis, covering choke openings between 10 and 100 percent, and Reynolds numbers between 150 and 400. The dimensionless numbers in the correlations show the dependence of the slug velocity on differential pressure, choke valve opening, and mixture flowrate. The correlation predicts 90% of the measurements within a 10% maximum percentage error. The mean absolute deviation of the correlation is about 9%. The model can be applied for low flow rates typical of some flow conditions in subsea pipelines, and choke openings between 10-98%. The correlation can predict the slug velocity and production rates for vertical and catenary riser systems. Keywordssubsea pipelines; severe slugging; dimensionless analysis; two phase flow; oil recovery.","PeriodicalId":184087,"journal":{"name":"Progress in Canadian Mechanical Engineering. Volume 3","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128317218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}