the model developed and an analysis of the performance of the unglazed transpired solar collector The model pre-dicts the air temperature rise for specific operating condi-tions and estimates the UTC design parameters for specific hot air requirements 2 Development of a mathematical model of unglazed transpired solar collector 2 1 compared to conventional hot air drying (Decareau 1985) Doymaz et al (2006) studied drying of dill leaves with microwave power and presented a mathematical model for it The mathematical modeling was also studied for drying mint leaves by Ozbek and Dadali (2007) Besides that some other researchers studied the spinach

Teaching and Learning Mathematical Modelling

Modelling is now one of the six general mathematical competencies defined in the educational standards for mathematics introduced in Germany in 2003 and there have been several initiatives to implement modelling in schools as well as a whole range of empirical research projects focusing on teachers or students in modelling processes

Mathematical modeling of handmade recycled paper drying kinetics and sorption isotherms Drying of recycled cellulose pulp was carried out under laboratory environment conditions and in a convective dryer with forced air circulation and controlled conditions of air temperature and velocity (GAB model) kinetic constant related to the

The heat transfer characteristics and kinetics of Camellia oleifera seeds under hot-air drying were investigated at different temperatures (40 60 and 80 C) and loading densities (0 92 1 22 and 1 52 g/cm 2) with a constant air velocity of 1 m/s Twelve common drying kinetic models were selected to fit the experimental data

Furthermore the model required significant computational resources because of 3D approach especially when thick insulation or significant amount of phase‐change materials were used 10 Other attempts at modelling shipping containers also include the use of finite element (FE) modelling by Wang et al or computational fluid dynamics (CFD) by

Air Toxics Modeling Dispersion models are used to support a variety of air toxics regulations Several models user's guides and guidance documents are available for these purposes from the Support Center for Regulatory Air Models (SCRAM) website One of the most commonly used dispersion models is the Industrial Source Complex (ISC3) model

Mathematical model

A mathematical model is a description of a system using mathematical concepts and language The process of developing a mathematical model is termed mathematical modeling Mathematical models are used in the natural sciences (such as physics biology earth science chemistry) and engineering disciplines (such as computer science electrical

Kinetic modeling of process parameters is very useful in food processes (2016) Drying Kinetics and Mathematical Modeling of Hot Air Drying of Coconut Coir Pith Fernando and Amarasinghe Springer Plus 5 807 N Janius R Nawi N and Abdan K (2015a) Computer Simulation of Convective Hot Air Drying Kinetics of Pumpkin (Cucurbita

of the kinetic energy and exergy of quince fruit in a hot air dryer The prediction ability of ANFIS was compared with ANN and other mathe-matical models ANFIS had the best performance Kaveh et al (2018b) compared the use of ANFIS ANN and other eleven (11) mathematical models inpredictionof moisture ratioof an almondkernel in a convective

Dec 23 2016In all of the cases mentioned above it is important for engineers and scientists to understand and design systems to control natural convection In this context mathematical modeling is the perfect tool In the latest version of COMSOL Multiphysics it is easier to define and solve problems involving natural convection

1 INTRODUCTION The quality of perishable goods such as seafood goods and medicines is strongly affected by surrounding temperature 1 In order to avoid deterioration during transportation and storage the temperature of the products and the surrounding environment needs to be carefully controlled With rising population and uneven distribution of goods

Jan 01 2014Drying of pumpkin (Cucurbita moschata) was investigated experimentally using a hot air convective dryer 30 samples of pumpkin with thickness of 2 mm and 4 mm were subjected to 11 hours drying at temperatures 50 C 60 C and 70 C respectively The drying data were fitted to the Moisture Ratio (MR) models which produced MR = aexp-kt as the model of

Over Fig 9 I have plotted the convective surface conductances predicted by correlations T9 8 and HHT* (natural convection above a hot horizontal plate) Above surface-to-air temperature differences of 20 K the measured values are greater than or equal to those predicted by HHT*

This study strongly supports a role of social distancing as an effective way to mitigate COVID-19 transmission in the USA Until a COVID-19 vaccine is widely available social distancing will remain one of the primary measures to combat disease spread and these findings should serve to support more timely policy making around social distancing in the USA in the future

HEAT AND MASS TRANSFER

Heat transfer and mass transfer are kinetic processes that may occur and be studied separately or jointly model the heating by our fingers the extent of finger contact the thermal convection through the air etc By energy dissipation phenomena space-time modelling additional mathematical modelling and experimental

24 Inyang Uwem Ekwere et al : Mathematical and Kinetic Modelling for Convective Hot Air Drying of Sweet Potatoes (Ipomoea batatas L) (b) MR M α (5) Thus the proposed correlation considers the proportionality of the MR to the different drying factors (mass and time) as presented in Equations 4 and 5

The accompanying website will host additional MATLAB/Scilab problems model question papers simulation exercises tutorials and projects This book will be useful for students of chemical engineering mechanical engineering instrumentation engineering and mathematics

Drying of pumpkin (Cucurbita moschata) was investigated experimentally using a hot air convective dryer 30 samples of pumpkin with thickness of 2 mm and 4 mm were subjected to 11 hours drying at temperatures 50 C 60 C and 70 C respectively The

the model developed and an analysis of the performance of the unglazed transpired solar collector The model pre-dicts the air temperature rise for specific operating condi-tions and estimates the UTC design parameters for specific hot air requirements 2 Development of a mathematical model of unglazed transpired solar collector 2 1

Jul 01 2019The kinetic modelling of thin layer drying is performed with various agricultural products such as seeds grains fruits and some plant species with economic importance Sweet Potato ( Ipomoea batatas L ) is a widely consumed and its industrialization is on the increase The thin layer drying kinetics of sweet potato were experimentally investigated in a convective hot air

Jan 19 2020As reported by the World Health Organization a novel coronavirus (2019-nCoV) was identified as the causative virus of Wuhan pneumonia of unknown etiology by Chinese authorities on 7 January 2020 In this study we developed a Bats-Hosts-Reservoir-People transmission network model for simulating the potential transmission from the infection source