scholarly journals Mathematical and Computer Simulation of the Interconnected Processes Mass, Heat and Moisture Transfer in Horizontal Soil Media

2019 ◽  
pp. 82-83
Author(s):  
Anatolii Vlasyuk ◽  
Ihor Ilkiv
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Numerical Experiments ◽  
Moisture Transfer ◽  
Soil Layer ◽  
Nonlinear Mathematical Model ◽  
Mathematical And Computer Simulation ◽  
Soil Media ◽  
Mass And Heat Transfer ◽  
Heat And Moisture

The nonlinear mathematical model of a interconnected processes of moisture transfer, mass and heat transfer in horizontal soil layer is presented. The  numerical solution of the respective boundary value problem was obtained by the method of finite differences using the monotonic scheme. Software was created on the basic of developed algorithms and a series of numerical experiments were done.

scholarly journals Mathematical Modeling of the Process of Micro Irrigation in the Soil Layer under Conditions of Heat and Mass Transfer

2019 ◽  
pp. 84-85
Author(s):  
Anatolii Vlasyuk ◽  
Viktor Ogiychuk
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Mass Transfer ◽  
Boundary Value Problem ◽  
Heat And Mass Transfer ◽  
Finite Differences ◽  
Numerical Experiments ◽  
Soil Layer ◽  
Nonlinear Mathematical Model ◽  
Micro Irrigation

The nonlinear mathematical model of a process micro irrigation in non-saturated of soil layer under of heat and mass transfer has presented. The numerical solution of the espective boundary value problem has obtained by the method of finite differences using the monotonic scheme. Software had created on the basic of developed algorithms and a series of numerical experiments were done.

Mathematical Models of Papermaking

2001 ◽  
Vol 6 (1) ◽  
pp. 9-19 ◽  
Author(s):  
A. Buikis ◽  
J. Cepitis ◽  
H. Kalis ◽  
A. Reinfelds ◽  
A. Ancitis ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Initial Value Problems ◽  
Moisture Transfer ◽  
Bound Water ◽  
Drying Process ◽  
Initial Value ◽  
First Order ◽  
Heat And Moisture ◽  
The Mathematical Model ◽  
The Web

The mathematical model of wood drying based on detailed transport phenomena considering both heat and moisture transfer have been offered in article. The adjustment of this model to the drying process of papermaking is carried out for the range of moisture content corresponding to the period of drying in which vapour movement and bound water diffusion in the web are possible. By averaging as the desired models are obtained sequence of the initial value problems for systems of two nonlinear first order ordinary differential equations. 

Heat and moisture transfer from skin to environment through fabrics: A mathematical model

2007 ◽  
Vol 50 (25-26) ◽  
pp. 5292-5304 ◽  
Author(s):  
Kyunghoon Min ◽  
Yangsoo Son ◽  
Chongyoup Kim ◽  
Yejin Lee ◽  
Kyunghi Hong
Keyword(s):  
Mathematical Model ◽  
Moisture Transfer ◽  
Heat And Moisture Transfer ◽  
Heat And Moisture

NUMERICAL SIMULATION FOR EFFECTS OF MICROCAPSULED PHASE CHANGE MATERIAL (MPCM) DISTRIBUTION ON HEAT AND MOISTURE TRANSFER IN POROUS TEXTILES

2009 ◽  
Vol 23 (03) ◽  
pp. 501-504 ◽  
Author(s):  
FENGZHI LI
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Materials ◽  
Moisture Transfer ◽  
Physical Parameters ◽  
Heat And Moisture Transfer ◽  
Numerical Predictions ◽  
Coupled Heat And Moisture ◽  
Heat And Moisture ◽  
Transfer Properties

In recent years, the use of phase change materials (PCM) to improve heat and moisture transfer properties of clothing has gained considerable attention. The PCM distribution in the clothing impacts heat and moisture transfer properties of the clothing significantly. For describing the mechanisms of heat and moisture transfer in clothing with PCM and investigating the effect of the PCM distribution, a new dynamic model of coupled heat and moisture transfer in porous textiles with PCM was developed. The effect of water content on physical parameters of textiles and heat transfer with phase change in the PCM microcapsules were considered in the model. Meanwhile, the numerical predictions were compared with experimental data, and good agreement was observed between the two, indicating that the model was satisfactory. Also the effects of the PCM distribution on heat transfer in the textiles-PCM microcapsule composites were investigated by using the model.

The Model of Mass and Heat Transfer in LPG Tanks Partially Exposed to Jet Fire

2003 ◽  
Author(s):  
Zhixiang Xing ◽  
Juncheng Jiang
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Test Data ◽  
Pool Fire ◽  
Time To Failure ◽  
Tank Wall ◽  
Fire Exposure ◽  
Dangerous Situation ◽  
Mass And Heat Transfer ◽  
Physical Phenomena

This paper describes a mathematical model developed to study the behavior of LPG tanks when subjected to jet fire. The model consists of a number of field and zone sub-models which are used to simulate the various physical phenomena taking place during the tank engulfment period. The comparisons between the model predicted results and the test data showed better agreement. The results showed that the jet fire partially impingement on tank wall led to higher wall temperatures and the time to failure was shorter than in engulfing pool fire. And the fire exposure started at the vapor wall is under more dangerous situation than the fire exposure at the bottom of the tank.

Comparisons between Experiments and a Theoretical Model of Heat and Mass Transfer in Rotary Regenerators with Nonsorbing Matrices

1981 ◽  
Vol 103 (2) ◽  
pp. 189-195 ◽  
Author(s):  
J. G. van Leersum ◽  
C. W. Ambrose
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Mass Transfer ◽  
Theoretical Model ◽  
Heat And Mass Transfer ◽  
Equilibrium Model ◽  
Experimental Facility ◽  
Heat And Moisture ◽  
Good Agreement

A mathematical model of condensation, evaporation and heat transfer in a regenerator having a non sorbing matrix is derived. Good agreement between heat and moisture effectivities predicted by a simulation of the model, and corresponding results from an independently derived equilibrium model is shown for a particular case. Details of an experimental facility for testing the performance of a rotary regenerator are given, and a comparison between results obtained from the facility and those produced by the model are given.

scholarly journals Membrane Based Enthalpy Heat Exchanger Performance in HVAC System

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
M. S. Nasif ◽  
G. L. Morrison ◽  
M. Behnia
Keyword(s):  
Mathematical Model ◽  
Heat Exchanger ◽  
Energy Recovery ◽  
System Analysis ◽  
Moisture Transfer ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Air Conditioner ◽  
Hvac System ◽  
Heat And Moisture

The performance of a membrane based heat exchanger utilizing porous paper as the heat and moisture transfer media used in ventilation energy recovery systems is presented. A mathematical model was developed and validated against the experimental results. This model can be used for design aide to predict the effectiveness of the heat exchanger. Furthermore, system analysis of an air conditioner shows an increase in the coefficient of performance and cooling capacity when paper heat exchanger is used, especially in a climate similar to the weather in Malaysia and Darwin.

Sign in / Sign up

Export Citation Format

Share Document