Radio Frequency Vacuum Drying of Timber: Mathematical Model and Numerical Analysis

Summary A numerical method is proposed to predict the stochastic dispersion of data that unavoidably occurs in a real drying process. The method is based on the use of discrete frequency distribution curves to predict a random variation on some parameters of the process and is applied to the case of radio frequency vacuum (RFV) drying of wood. Experimental data of RFV drying of western hemlock timbers were used to obtain the numeric values of the stochastic parameters and their standard deviation. A mathematical model was designed to simulate the final moisture content dispersion on hypothetical examples. Results were quantified using three indices: average, range and standard deviation.

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Mass and heat transfer mechanism in wood during radio frequency/vacuum drying and numerical analysis

Journal of Forestry Research ◽

10.1007/s11676-016-0269-3 ◽

2016 ◽

Vol 28 (1) ◽

pp. 205-213

Author(s):

Xiaoran Jia ◽

Jingyao Zhao ◽

Yingchun Cai

Keyword(s):

Heat Transfer ◽

Numerical Analysis ◽

Radio Frequency ◽

Transfer Mechanism ◽

Vacuum Drying ◽

Heat Transfer Mechanism ◽

Mass And Heat Transfer

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Comprehensive mathematical model and efficient numerical analysis of the design parameters of the parabolic trough receiver

International Journal of Thermal Sciences ◽

10.1016/j.ijthermalsci.2020.106777 ◽

2021 ◽

Vol 162 ◽

pp. 106777

Author(s):

Lyudmila Knysh

Keyword(s):

Mathematical Model ◽

Numerical Analysis ◽

Design Parameters ◽

Parabolic Trough

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Theoretical and numerical analysis of novel COVID-19 via fractional order mathematical model

Results in Physics ◽

10.1016/j.rinp.2020.103676 ◽

2021 ◽

Vol 20 ◽

pp. 103676

Author(s):

Amjad Ali ◽

Muhammad Yasin Khan ◽

Muhammad Sinan ◽

F.M. Allehiany ◽

Emad E. Mahmoud ◽

...

Keyword(s):

Mathematical Model ◽

Numerical Analysis ◽

Fractional Order ◽

Theoretical And Numerical Analysis

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The Numerical Analysis of the Velocity and Pressure Distribution of the Oil Film in Heavy Hydrostatic Thrust Bearing

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.541-542.658 ◽

2014 ◽

Vol 541-542 ◽

pp. 658-662

Author(s):

Jian Li ◽

Yuan Chen ◽

Yang Chun Yu ◽

Zhu Xin Tian ◽

Yu Huang

Keyword(s):

Mathematical Model ◽

Numerical Analysis ◽

Pressure Distribution ◽

Working Conditions ◽

Thrust Bearing ◽

Rotation Speed ◽

The Other ◽

Surface Load ◽

Oil Film ◽

Volume Method

To study the velocity and pressure distribution of the oil film in a heavy hydrostatic thrust bearing, a mathematical model of the velocity is proposed and the finite volume method (FVM) has been used to simulate the flow field under different working conditions. Some pressure experiments were carried out and the results verified the correctness of the simulation. It is concluded that the pressure distribution varies small under different rotation speed when the surface load on the workbench is constant. But the velocity of the oil film is influenced greatly by the rotation speed. When the rotation speed of the workbench is as quick as enough, the velocity of the oil film on one radial side of the pad will be zero, that is to say the lubrication oil will be drained from the other three sides of the recess.

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