Simulation and measurement of velocity and concentration of dry wood fibres flowing through a throttle

Melander, Olof; Rasmuson, Anders

doi:10.3183/npprj-2005-20-01-p078-086

Cited by 4 publications

(3 citation statements)

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“…Pang [3,4] has presented a mathematical model for the MDF fiber drying process using simplified hydrodynamics. Detailed experimental and theoretical studies of the fluid dynamics of wood fibers in gas flows have been performed by Melander et al [5][6][7][8] Hidayat and Rasmuson [9] have recently coupled detailed multiphase flow simulations with drying.…”

Section: Introductionmentioning

confidence: 99%

The Drying Kinetics and Equilibrium Moisture Content of MDF Fibers

2009

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An experimental device was constructed to study the drying kinetics of wood fibers under controlled conditions. The device consisted of a drying chamber in which a net basket filled with the fiber material was connected to a load cell. The drying medium was then forced through the basket at controlled levels of humidity and temperature.Experiments were performed with spruce fibers and the drying medium at varying temperature (50-170 C) and relative humidity (1-86%). In general, the drying rate increased with increasing temperature and decreasing relative humidity. A constant drying rate period was observed in all cases. The critical moisture content was approximately 1.25. The characteristic drying curve has a slight downward concave shape. The equilibrium moisture contents obtained at ambient temperature agree well with data in the literature.

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Section: Introductionmentioning

confidence: 99%

The Drying Kinetics and Equilibrium Moisture Content of MDF Fibers

2009

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“…(3)) was derived from the expressions for the force on a single fiber. [6] These were subsequently used in the averaged momentum equations of the Eulerian-Eulerian two-fluid model. An average fiber orientation of 45 was assumed.…”

Section: Drag Modelmentioning

confidence: 99%

“…Pang [1,4] presented a mathematical model for the MDF fiber drying process using simplified hydrodynamics. Detailed experimental and theoretical studies of the fluid dynamics of wood fibers in gas flows have been made by Melander et al [5][6][7][8] Multiphase flow simulations have recently been coupled with drying of spherical particles by several authors (e.g., Hidayat and Rasmuson [9] and Skuratovsky et al [10,11] ).…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of Heat, Mass, and Momentum Transport in MDF Fiber Drying

Melander

Rasmuson

2010

Drying Technology

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A 3D two-phase flow drying model for medium density fiberboard (MDF) fibers was developed and implemented in the Ansys-CFX commercial CFD software. The model was validated against measurement data [1] with satisfactory results. A parameter study was done to study the effects of dryer temperature and mass loading of fibers. A realistic dryer geometry has been simulated and it has been demonstrated that the model can capture 2D and 3D flow phenomena that affect the drying results. The simulation results can be used to determine suitable ways for improving dryer efficiency.

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A dispersion force approach to modelling the effect of lift forces on fibre dispersion

Melander

Rasmuson

2007

International Journal of Multiphase Flow

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Simulation and measurement of velocity and concentration of dry wood fibres flowing through a throttle

Cited by 4 publications

References 0 publications

The Drying Kinetics and Equilibrium Moisture Content of MDF Fibers

The Drying Kinetics and Equilibrium Moisture Content of MDF Fibers

Mathematical Modeling of Heat, Mass, and Momentum Transport in MDF Fiber Drying

A dispersion force approach to modelling the effect of lift forces on fibre dispersion

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