Simulation of the Thermal Environment and Velocity Distribution in a
Lecture Hall

Li, Guolin

doi:10.32604/fdmp.2020.09219

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…The standard k-ε model with high stability and calculation accuracy is used to solve the governing equations. The calculation equations are as follows [39]: Turbulent kinetic energy k equation:…”

Section: Flow Field Numerical Calculation Model and Boundary Conditionsmentioning

confidence: 99%

An Experimental and Numerical Study on the Cleaning of Pleated Bag Filters Using Low-Pressure Pulsed-Jets

Chen¹,

Sun²,

Qian³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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Section: Flow Field Numerical Calculation Model and Boundary Conditionsmentioning

confidence: 99%

An Experimental and Numerical Study on the Cleaning of Pleated Bag Filters Using Low-Pressure Pulsed-Jets

Chen¹,

Sun²,

Qian³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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“…The standard k À e model with high stability and calculation accuracy is used to solve the governing equations. The calculation equations are as follows [14]:…”

Section: Turbulence Modelmentioning

confidence: 99%

“…Tab. 2 depicts that the relative error between Mesh 1 and the other two sets of mesh is larger, and the relative error between Mesh 2 and Mesh 3 is smaller [14]. Hence, Mesh 2 was selected on the premise of consideration of the calculation accuracy and calculation time.…”

Section: Computational Meshmentioning

confidence: 99%

Numerical Simulation of U-Shaped Metal Rings in a Wind-Sand Environment

Wang¹,

Li²,

Chai³

et al. 2021

Fluid Dynamics &Amp; Materials Processing

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The interaction of U-shaped rings used for power transmission hardware with a wind-sand field is simulated numerically. A standard k À turbulence model is used in synergy with an Eulerian-Lagrangian approach. The results show that the wind pressure on the windward side of the U-shaped ring is the highest, a negative pressure zone appears on both sides of the U-shaped ring, while a Kármán Vortex Street is created on its leeward side. There are three possible regimes of motion for the sand grains in the wind field. Sand grains with size below 0.125 mm can follow the airflow directly into the contact area of two U-shaped rings. When the sand size is about 0.1 mm, the number of sand grains that are blown into the contact area attains a maximum. Through the simulation of U-shaped rings in the wind-sand field, the dynamics of such processes are explained in detail, thereby providing relevant information for the subsequent protection and design of connecting hardware used for power transmission.

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“…It has a wide application in daily life, while its flammability brings multiple potential safety hazards [6]. Current flame retardancy studies involve intercalation cations of LDHs, interlayer inorganic anions of LDHs, interlayer organic anions and surface modification [7]. Based on the two aspects of green synthesis MgAl-LDHs addition and anion intercalation, three characterization methods including thermogravimetric analysis, limiting oxygen index (LOI) and cone calorimetry are adopted to evaluate the effect of MgAl-LDHs on the flame retardance of EP [8].…”

Section: Introductionmentioning

confidence: 99%

A Study on a Magnesium-Based Layered Composite Used as a Flame Retardant for Phenolic Epoxy Resins

Liu¹,

Xiong²,

Wang³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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The effects of a magnesium-based layered composite on the flammability of a phenolic epoxy resin (EP) are studied. In order to produce the required composite material, first, magnesium hydroxide, aluminum salt and deionized water are mixed into a reactor according to a certain proportion to induce a hydrothermal reaction; then, the feed liquid is filtered out using a solid-liquid separation procedure; finally, the material is dried and crushed. In order to evaluate its effects on the flammability of the EP, first, m-phenylenediamine is added to EP and vacuum defoamation is performed; then, EP is poured into a polytetrafluoroethylene mold, cooled to room temperature and demoulded; finally, the magnesium-based layered composite is added to EP, and its flame retardance is characterized by thermogravimetric analysis, limiting oxygen index and cone calorimetry. The X-ray diffraction patterns show that the baseline of magnesium-based layered composite is stable and the front shape is sharp and symmetrical when the molar ratio of magnesium to aluminium is 3.2:1; with the addition of magnesium-based layered composite, the initial pyrolysis temperature of EP of 10%, 15% and 30% magnesium-based layered composite decreases to 318.2°C, 317.9°C and 357.1°C, respectively. After the reaction, the amount of residual carbon increases to 0.1%, 3.45% and 8.3%, and the limiting oxygen index increases by 28.3%, 29.1% and 29.6%, respectively. The maximum heat release rate of cone calorimeter decreases gradually. The optimum molar ratio of Mg:Al for green synthesis is 3.2:1, and the NO3-intercalated magnesium-based layered composite has the best flame retardance properties.

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Simulation of the Thermal Environment and Velocity Distribution in a Lecture Hall

Cited by 8 publications

References 6 publications

An Experimental and Numerical Study on the Cleaning of Pleated Bag Filters Using Low-Pressure Pulsed-Jets

An Experimental and Numerical Study on the Cleaning of Pleated Bag Filters Using Low-Pressure Pulsed-Jets

Numerical Simulation of U-Shaped Metal Rings in a Wind-Sand Environment

A Study on a Magnesium-Based Layered Composite Used as a Flame Retardant for Phenolic Epoxy Resins

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