Numerical Analysis of Direct Type Greenhouse Dryer

2017 ◽  
Author(s):  
Vishal Gupta ◽  
Abhishek Sharma ◽  
Khushboo Sabharwal Gupta
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Temperature ◽  
Food Preservation ◽  
Agricultural Produce ◽  
Drying Techniques ◽  
Computational Fluid Dynamics Cfd ◽  
Short Span ◽  
Air Circulation ◽  
Local Parameters

For food preservation, drying techniques is most widely used. Earlier drying was done openly in sun. But now with increased awareness, drying of agricultural produce is done with care. Greenhouse dryers are being mostly used. Good greenhouse dryers are considered one which can dry products in short span of time. For obtaining good quantity of dried products, the design of greenhouse dryer should be such that the air circulation is good and high temperature can be achieved near the crops. In present work, Computational Fluid Dynamics (CFD) approach has been used to visualize the air flow pattern and temperature distribution near the crops i.e., inside the direct type greenhouse dryer. Experimentally obtained data has been used as boundary conditions and numerically obtained results are helpful in understanding local parameters which cannot be found out experimentally.

Airflow Modeling and Simulation Required in CBRN Collective Protection Design

2016 ◽  
Vol 22 (3) ◽  
pp. 649-653 ◽  
Author(s):  
Claudiu Lăzăroaie ◽  
Teodora Zecheru ◽  
Ciprian Său ◽  
Tudor Cherecheş
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Speed ◽  
Flow Dynamics ◽  
Computational Fluid Dynamics Cfd ◽  
Strategic Position ◽  
Industrial Materials ◽  
Materials Used ◽  
Commercial Applications ◽  
Air Circulation

Abstract Many CBRN agents are very difficult to detect and identify, due to the fact that most technologies, equipment and materials used for their obtainment have also commercial applications. One possibility to counteract such threats, both for military and civilians, is to use systems of collective protection (COLPRO), which must be manufactured from materials that can withstand not only the action of CBRN agents, but, as much as possible, toxic industrial materials (TIMs). The computational fluid dynamics (CFD) study of the atmosphere in the neighbourhood of the COLPRO tent and the air flow dynamics inside the tent give all the necessary data regarding the effect of air circulation on the entire COLPRO system. Based on this study, a favourable orientation of the COLPRO tent may be established relatively to the strategic position of the troops or the civilian groups, versus statistical wind speed, direction and charge.

Numerical Simulation of Packed Liquid Food Thermal Process Using Computational Fluid Dynamics (CFD)

2011 ◽  
Vol 7 (4) ◽  
Author(s):  
Pedro Esteves Duarte Augusto ◽  
Marcelo Cristianini
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Thermal Processing ◽  
Food Preservation ◽  
Liquid Food ◽  
Heating And Cooling ◽  
Fluid Behavior ◽  
Liquid Model ◽  
Computational Fluid Dynamics Cfd ◽  
Experimental Processing

Thermal processing is one of the safest and most used methods of food preservation. Although the computational fluid dynamics (CFD) has been used by several authors for liquid food thermal processing evaluation, just a few studies have compared the data obtained by CFD with experiments. The present work evaluated a liquid model food pasteurization in two commercial bottles using CFD. The model validation was carried out by comparing the obtained thermal profile with experimental data. The fluid behavior during heating and cooling was detailed. The data obtained using CFD described well the experimental processing, which suggest the possibility of using CFD for temperature profile evaluation in thermal processing of packaged convective foods.

Study on Temperature Distribution of a Honeycomb Regenerator during Preheating Process

2012 ◽  
Vol 170-173 ◽  
pp. 2699-2702
Author(s):  
Zhen Min Cui
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Temperature ◽  
Temperature Distribution ◽  
Numerical Model ◽  
Three Dimensional ◽  
Combustion Method ◽  
Outlet Temperature ◽  
High Temperature Air Combustion ◽  
Computational Fluid Dynamics Cfd

The HiTAC technology (High Temperature Air Combustion) is a reliable, industry proven combustion method. A three-dimensional numerical model is established which is for unsteady preheating process in honeycomb regenerator. The preheating period of honeycomb was simulated by means of computational fluid dynamics (CFD) software; the outlet temperature, temperature at lengthways of gas, and temperature at lengthways of honeycomb were obtained.

MODELING OF THE COMPLETE MECHANISM OF OXIDATION OF PHENYL RADICAL UNDER COMBUSTION CONDITIONS

2020 ◽  
Author(s):  
G. I. Tolstov ◽  
◽  
I. A. Medvedkov ◽  
D. P. Porfiriev ◽  
M. V. Zagidullin ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
High Temperature ◽  
Quantum Chemical ◽  
Experimental Measurements ◽  
Phenyl Radical ◽  
Flow Tube ◽  
Cfd Simulations ◽  
Computational Fluid Dynamics Cfd ◽  
Mechanism Of Oxidation

Quantum chemical calculations, computational fluid dynamics (CFD) simulations, and isothermal approximation were applied for the interpretation of experimental measurements of the reaction of С6Н5 + O2 in the high-temperature microreactor and of the pressure drop in the flow tube of the reactor.

Evaluation of Geometric Symmetry Condition in Numerical Simulations of Thermal Process of Packed Liquid Food by Computational Fluid Dynamics (CFD)

2010 ◽  
Vol 6 (5) ◽  
Author(s):  
Pedro Esteves Duarte Augusto ◽  
Marcelo Cristianini
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Numerical Simulations ◽  
Thermal Process ◽  
Computational Effort ◽  
Food Preservation ◽  
Liquid Food ◽  
Cfd Simulations ◽  
Geometric Symmetry ◽  
Computational Fluid Dynamics Cfd

The growing demand for safer food and better nutritional and sensory quality creates the need for a better understanding of the processes involved in food production. Computational fluid dynamics (CFD) has been used by several authors for a better understanding of liquid food thermal process, one of the safest and most frequently used methods for food preservation. This study evaluated the condition of geometric symmetry used in numerical simulations of thermal process of packed liquid food via CFD. The analysis of temperature profiles obtained experimentally and through models built on 1/1, 1/4, 1/8, 1/16 and 1/32 of package geometry showed good correlation with the CFD simulations. The results indicate that the axial symmetry of the bottles allows the use of smaller models, which saves computational effort.

scholarly journals Computational fluid dynamics evaluation of liquid food thermal process in a brick shaped package

2012 ◽  
Vol 32 (1) ◽  
pp. 134-141 ◽  
Author(s):  
Pedro Esteves Duarte Augusto ◽  
Marcelo Cristianini
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Thermal Process ◽  
Food Preservation ◽  
Thermal Processes ◽  
Rheological Characterization ◽  
Unit Operations ◽  
Liquid Foods ◽  
Computational Fluid Dynamics Cfd ◽  
Food Processes

Food processes must ensure safety and high-quality products for a growing demand consumer creating the need for better knowledge of its unit operations. The Computational Fluid Dynamics (CFD) has been widely used for better understanding the food thermal processes, and it is one of the safest and most frequently used methods for food preservation. However, there is no single study in the literature describing thermal process of liquid foods in a brick shaped package. The present study evaluated such process and the influence of its orientation on the process lethality. It demonstrated the potential of using CFD to evaluate thermal processes of liquid foods and the importance of rheological characterization and convection in thermal processing of liquid foods. It also showed that packaging orientation does not result in different sterilization values during thermal process of the evaluated fluids in the brick shaped package.

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