scholarly journals Numerical simulation as method of research and improvement of side ventilation system in poultry house with traditional ranking of exhaust fans

2020 ◽  
Vol 11 (3) ◽  
pp. 121-128
Author(s):  
V. I. Trokhaniak ◽  
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Ventilation System ◽  
Winter Period ◽  
Internal Environment ◽  
Poultry House ◽  
Current Lines ◽  
Traditional Setting ◽  
Ventilation Systems

In order to ensure a normalized and uniform internal environment in the poultry house, for large productions, new ventilation systems are needed. As part of this study, numerical simulations of the lateral ventilation system in the poultry house during the winter period of the year were performed. The result is the fields of velocities, current lines and pressures in the poultry house in a 3D setting. It was found that the supply valves located at a height of 200 mm from the floor work much more efficiently than in the traditional setting at a height of 400 mm. Installation of walls on the inside of the poultry house frame, as well as reducing the height of the floor improve the aerodynamics in the poultry house.

scholarly journals USING CFD SIMULATION TO INVESTIGATE THE IMPACT OF FRESH AIR VALVES ON POULTRY HOUSE AERODYNAMICS IN CASE OF A SIDE VENTILATION SYSTEM

2020 ◽  
pp. 155-164
Author(s):  
Viktor Trokhaniak ◽  
Ivan Rogovskii ◽  
Luidmyla Titova ◽  
Zoriana Dziubata ◽  
Petro Luzan ◽  
...  
Keyword(s):  
Large Scale ◽  
Cfd Simulation ◽  
Ventilation System ◽  
Climatic Conditions ◽  
Temperature Fields ◽  
Poultry House ◽  
Computational Fluid Dynamics Cfd ◽  
Current Lines ◽  
The Impact ◽  
Better Than

Exposure and the outbreak of diseases result in significant losses in large scale poultry operation. New ventilation systems are necessary to provide safe and homogenous internal environment at large enterprises, especially under the changeable climatic conditions of global warming. Within the framework of this investigation, computational fluid dynamics (CFD) simulation of a side ventilation system in a poultry house during winter seasons has been conducted. As results, 3D temperature fields, current lines and pressures in a poultry house have been found. It has been determined that fresh air valves arranged at a height of 200 mm from flooring work better than those traditionally arranged at a height of 400 mm. The erection of walls on the inside of a poultry house framework as well as the decrease in the height of flooring improve poultry house aerodynamics.

NUMERICAL SIMULATION OF VENTILATION SYSTEM WITHIN AN ARMORED VEHICLE CABIN

2007 ◽  
Vol 14 (2) ◽  
pp. 201-223
Author(s):  
Chin-Lung Chang ◽  
Chang-Hsien Tai ◽  
Chien-Hsiung Tsai ◽  
Yu-Ren Wang ◽  
Qing-Shan Hon
Keyword(s):  
Numerical Simulation ◽  
Ventilation System ◽  
Vehicle Cabin ◽  
Armored Vehicle

scholarly journals Wind shear over the Nice Côte d'Azur airport: case studies

2013 ◽  
Vol 13 (9) ◽  
pp. 2223-2238 ◽  
Author(s):  
A. Boilley ◽  
J.-F. Mahfouf
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Numerical Simulations ◽  
Wind Shear ◽  
Horizontal Wind ◽  
Wind Profiler ◽  
Measurement Campaign ◽  
Wind Lidar ◽  
Real Time Applications ◽  
Wind Shears

Abstract. The Nice Côte d'Azur international airport is subject to horizontal low-level wind shears. Detecting and predicting these hazards is a major concern for aircraft security. A measurement campaign took place over the Nice airport in 2009 including 4 anemometers, 1 wind lidar and 1 wind profiler. Two wind shear events were observed during this measurement campaign. Numerical simulations were carried out with Meso-NH in a configuration compatible with near-real time applications to determine the ability of the numerical model to predict these events and to study the meteorological situations generating an horizontal wind shear. A comparison between numerical simulation and the observation dataset is conducted in this paper.

Stefan Number-Insensitive Numerical Simulation of the Enthalpy Method for Stefan Problems Using the Space-Time Conservation Element and Solution Element Method

2004 ◽  
Author(s):  
Anahita Ayasoufi ◽  
Theo G. Keith ◽  
Ramin K. Rahmani
Keyword(s):  
Numerical Simulation ◽  
Phase Change ◽  
Numerical Simulations ◽  
Latent Heat ◽  
Space Time ◽  
Enthalpy Method ◽  
Stefan Problems ◽  
Stefan Number ◽  
Original Scheme ◽  
Solution Element

An improvement is introduced to the conservation element and solution element (CE/SE) phase change scheme presented previously. The improvement addresses a well known weakness in numerical simulations of the enthalpy method when the Stefan number, (the ratio of sensible to latent heat) is small (less than 0.1). Behavior of the improved scheme, at the limit of small Stefan numbers, is studied and compared with that of the original scheme. It is shown that high dissipative errors, associated with small Stefan numbers, do not occur using the new scheme.

Pneumatic pulsator design as an example of numerical simulations in engineering applications

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Krzysztof Wołosz ◽  
Jacek Wernik
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Cast Iron ◽  
Numerical Simulations ◽  
Stress Analysis ◽  
Aluminium Alloy ◽  
Loose Material ◽  
Engineering Applications ◽  
Pressure Losses ◽  
Pneumatic Impact

AbstractThe paper presents the part of the investigation that has been carried out in order to develop the pneumatic pulsator which is to be employed as an unblocking device at lose material silo outlets. The part of numerical simulation is reported. The fluid dynamics issues have been outlined which are present during supersonic airflow thought the head of the pulsator. These issues describe the pneumatic impact phenomenon onto the loose material bed present in the silo to which walls the pulsator is assembled. The investigation presented in the paper are industrial applicable and the result is the working prototype of the industrial pneumatic pulsator. The numerical simulation has led to change the piston shape which is moving inside the head of the pulsator, and therefore, to reduce the pressure losses during the airflow. A stress analysis of the pulsator controller body has been carried out while the numerical simulation investigation part of the whole project. The analysis has made possible the change of the controller body material from cast iron to aluminium alloy.

A Wall Base Ventilation System Applied at Different Wall Geometries—Numerical Simulation of the Evaporative Process

2012 ◽  
Vol 30 (1) ◽  
pp. 1-12 ◽  
Author(s):  
J. M. P. Q. Delgado ◽  
A. S. Guimarães ◽  
V. P. de Freitas
Keyword(s):  
Numerical Simulation ◽  
Ventilation System

Comparative analysis of sustainable desiccant – Evaporative based ventilation systems for a typical Qatari poultry house

2021 ◽  
Vol 245 ◽  
pp. 114556
Author(s):  
Jean Paul Harrouz ◽  
Elvire Katramiz ◽  
Kamel Ghali ◽  
Djamel Ouahrani ◽  
Nesreen Ghaddar
Keyword(s):  
Comparative Analysis ◽  
Poultry House ◽  
Ventilation Systems

Numerical simulation of squeezing Cu–Water nanofluid flow by a kernel-based method

2021 ◽  
pp. 2250005
Author(s):  
Mojtaba Fardi ◽  
Yasir Khan
Keyword(s):  
Numerical Simulation ◽  
Hilbert Space ◽  
Linear System ◽  
Numerical Simulations ◽  
Numerical Results ◽  
Kernel Matrix ◽  
Nanofluid Flow ◽  
Parallel Disks ◽  
Engineering Problems ◽  
Well Conditioning

The main aim of this paper is to propose a kernel-based method for solving the problem of squeezing Cu–Water nanofluid flow between parallel disks. Our method is based on Gaussian Hilbert–Schmidt SVD (HS-SVD), which gives an alternate basis for the data-dependent subspace of “native” Hilbert space without ever forming kernel matrix. The well-conditioning linear system is one of the critical advantages of using the alternate basis obtained from HS-SVD. Numerical simulations are performed to illustrate the efficiency and applicability of the proposed method in the sense of accuracy. Numerical results obtained by the proposed method are assessed by comparing available results in references. The results demonstrate that the proposed method can be recommended as a good option to study the squeezing nanofluid flow in engineering problems.

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