Discrete Event Simulation of Bus Terminals

Lindberg, Therése

doi:10.3384/lic.diva-156646

Cited by 5 publications

(3 citation statements)

References 36 publications

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“…Clear trends weren't apparent at a ratio of 3, possibly due to the lack of a DEM particle restitution coefficient based on impact angle [17]. The influence of the confinement ratio can't be ruled out.…”

Section: Resultsmentioning

confidence: 95%

Flow-Induced Clogging in Microfiltration Membranes: Numerical Modeling and Parametric Study

Al Qahtani

2023

JWARP

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Microfiltration membrane technology has been widely used in various industries for solid-liquid separation. However, pore clogging remains a persistent challenge. This study employs (CFD) and discrete element method (DEM) models to enhance our understanding of microfiltration membrane clogging. The models were validated by comparing them to experimental data, demonstrating reasonable consistency. Subsequently, a parametric study was conducted on a cross-flow model, exploring the influence of key parameters on clogging. Findings show that clogging is a complex phenomenon affected by various factors. The mean inlet velocity and trans-membrane flux were found to directly impact clogging, while the confinement ratio and cosine of the membrane pore entrance angle had an inverse relationship with it. Two clog types were identified: internal (inside the pore) and external (arching at the pore entrance), with the confinement ratio determining the type. This study introduced a dimensionless number as a quantitative clogging indicator based on trans-membrane flux, Reynolds number, filtration time, entrance angle cosine, and confinement ratio. While this hypothesis held true in simulations, future studies should explore variations in clogging indicators, and improved modeling of clogging characteristics. Calibration between numerical and physical times and consideration of particle volume fraction will enhance understanding.

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Section: Resultsmentioning

confidence: 95%

Flow-Induced Clogging in Microfiltration Membranes: Numerical Modeling and Parametric Study

Al Qahtani

2023

JWARP

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“…The GSTIFF integrator is employed to solve the differential algebraic equations (DAE) described above. 34…”

Section: Methodsmentioning

confidence: 99%

Investigation of vehicle stability under crosswind conditions based on coupling methods

Huang

Wan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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In this study, vehicle stability under crosswind conditions is investigated. A two-way coupling method is established based on computational fluid dynamics and vehicle multi-body dynamics. Large eddy simulation is employed in the computational fluid dynamics model to compute the transient aerodynamic load, and the accuracy of the large eddy simulation is validated with a wind tunnel experiment. The arbitrary Lagrange–Euler technique is used in the computational fluid dynamics simulation to realise vehicle motion, and a real-time data transmission method is employed to ensure effective exchange of data between the computational fluid dynamics and multi-body dynamics models. The robustness of the two-way coupling model is verified by changing the position of the vehicle centroid. The results of the two-way and one-way coupling simulations demonstrate that crosswinds significantly affect vehicle stability. There is a clear difference between the results obtained with the two methods, particularly after the disappearance of the crosswind. The main reason for the difference is that the interaction between the transient airflow and the vehicle movement is considered in the two-way coupling method. Therefore, investigations of vehicle stability under crosswind conditions should consider the coupling of transient aerodynamic force and vehicle movement.

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“…Methodologically, the Learning Study is an iterative model of cycles of planning, performing, evaluating, and analysing teaching and learning practices. Three studies that use this research method are Larsson Lindberg (2020) for writing skills, Lindström (2015) for grammar, and Selin (2014) for the teaching and learning of oral interaction.…”

Section: Language Policy Multilingualism English-medium Instruction A...mentioning

confidence: 99%

Research on foreign language learning, teaching, and assessment in Sweden 2012–2021

2023

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This review provides an account of salient research topics in current Swedish research in the field of foreign language (FL) education, with the aim of making locally published work available outside Sweden. A corpus of work on English and other FLs published between 2012 and 2021 has been scrutinized. Focus has been placed on research conducted and disseminated in Sweden, in some cases adding international publications, in order to portray the work in a wider context. Research on FL learning, teaching, and assessment is reviewed in light of recent policy changes as well as a changing linguistic situation characterized by a plethora of languages spoken in society, among which Swedish as majority language and English as lingua franca share indisputable sovereignty, but where a newly-born interest in the role of other background languages than Swedish can be discerned. The study ends with a discussion of trends observed in the reviewed material and considerations in view of future research.

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Discrete Event Simulation of Bus Terminals

Cited by 5 publications

References 36 publications

Flow-Induced Clogging in Microfiltration Membranes: Numerical Modeling and Parametric Study

Flow-Induced Clogging in Microfiltration Membranes: Numerical Modeling and Parametric Study

Investigation of vehicle stability under crosswind conditions based on coupling methods

Research on foreign language learning, teaching, and assessment in Sweden 2012–2021

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