A moving boundary model for food isothermal drying and shrinkage: A shortcut numerical method for estimating the shrinkage factor

2019 ◽  
Vol 244 ◽  
pp. 212-219 ◽  
Author(s):  
A. Adrover ◽  
A. Brasiello ◽  
G. Ponso
Keyword(s):  
Numerical Method ◽  
Moving Boundary ◽  
Shrinkage Factor ◽  
Boundary Model ◽  
Isothermal Drying

scholarly journals A Moving Boundary Model for Isothermal Drying and Shrinkage of Chayote Discoid Samples: Comparison between the Fully Analytical and the Shortcut Numerical Approaches

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Alessandra Adrover ◽  
Antonio Brasiello
Keyword(s):  
Moving Boundary ◽  
Water Concentration ◽  
Sample Volume ◽  
Food Material ◽  
Shrinkage Function ◽  
Water Diffusivity ◽  
Boundary Model ◽  
Isothermal Drying ◽  
Numerical Approaches

A moving boundary model for food isothermal drying and shrinkage is applied to predict the time decay of water content and sample volume, as well as water diffusivity for chayote discoid slices in the temperature range 40–70°C. The core of the model is the shrinkage velocity v, assumed equal to the water concentration gradient times a shrinkage function α representing the constitutive equation of the food material under investigation. The aim is to provide a case study to analyze and quantify differences and accuracies of two different approaches for determining the shrinkage function α from typical experimental data of moisture content X/X0 vs. rescaled volume V/V0: a fully analytical approach and a shortcut numerical one.

Dynamic Simulation of an Organic Rankine Cycle (ORC) System Driven by Exhaust

2015 ◽  
Vol 738-739 ◽  
pp. 986-990
Author(s):  
Zhi Gang Wang ◽  
Jia Guang Cheng ◽  
Yan Wang ◽  
Qiang Shen
Keyword(s):  
Low Temperature ◽  
Control Strategy ◽  
Fossil Fuels ◽  
Moving Boundary ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Energy Crisis ◽  
Transient Phenomena ◽  
Simulation Results ◽  
Boundary Model

Organic Rankine Cycle (ORC) is one of the most promising technologies for low-temperature energy conversion. In recent years, it has gotten more attention due to the energy crisis and environmental problems caused by the combustion of fossil fuels. In this paper, a moving boundary model is introduced to describe the transient phenomena of evaporator and condenser, which are the important components of ORC. The simulation results are given to illustrate the efficiency and feasibility of the proposed control strategy.

scholarly journals A sharp-front moving boundary model for malignant invasion

2020 ◽  
Vol 412 ◽  
pp. 132639 ◽  
Author(s):  
Maud El-Hachem ◽  
Scott W. McCue ◽  
Matthew J. Simpson
Keyword(s):  
Moving Boundary ◽  
Boundary Model ◽  
Sharp Front

scholarly journals Construction and test of a moving boundary model for negative streamer discharges

2008 ◽  
Vol 77 (2) ◽  
Author(s):  
Fabian Brau ◽  
Alejandro Luque ◽  
Bernard Meulenbroek ◽  
Ute Ebert ◽  
Lothar Schäfer
Keyword(s):  
Moving Boundary ◽  
Boundary Model ◽  
Streamer Discharges

Effects of Belt Flexural Rigidity on the Transmission Error of a Carriage-driving System

2000 ◽  
Vol 122 (2) ◽  
pp. 213-218 ◽  
Author(s):  
Hung-Ming Tai ◽  
Cheng-Kuo Sung
Keyword(s):  
Boundary Conditions ◽  
Numerical Method ◽  
Experimental Technique ◽  
Moving Boundary ◽  
Flexural Rigidity ◽  
Three Dimensional ◽  
Transmission Error ◽  
Beam Model ◽  
Driving System ◽  
The Relationship

This paper investigates the effects of belt flexural rigidity and belt tension on transmission error of a carriage-driving system. The beam model associated with both the clamped and moving boundary conditions at two ends is utilized to derive the governing equation of the belt. The belt flexural rigidity is obtained and verified by an experimental technique. In addition, a numerical method is proposed to determine the belt profile, transmission error and transmission stiffness. Results show that transmission error of a carriage-driving system increases when the carriage moves away from the driving pulley due to finite belt flexural rigidity. According to the analyses, application of appropriate tension on the belt can significantly reduce the error. Furthermore, the transmission stiffness for representing the entire rigidity between the carriage and pulley is investigated based on the proposed beam model. A three-dimensional plot that indicates the relationship among the transmission stiffness, belt tension and the position of the carriage is obtained. [S1050-0472(00)01102-8]

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