scholarly journals The Influence of Meshing Strategies on The Numerical Simulation of Solar Greenhouse Dryer

2021 ◽  
Vol 947 (1) ◽  
pp. 012007
Author(s):  
Viet. T. Tran ◽  
Yen. H.P. Duong ◽  
Tan M. Le
Keyword(s):  
Numerical Simulation ◽  
Temperature Distribution ◽  
Relative Humidity ◽  
Mesh Generation ◽  
Optimum Conditions ◽  
Ansys Fluent ◽  
Solar Greenhouse ◽  
Hexahedral Meshing ◽  
Fluent Software ◽  
Tetrahedral Meshing

Abstract In the present study, we conduct the numerical simulation for solar greenhouse dryer performance by Ansys Fluent software. The numerical simulations compared the meshing strategies for the dryer and show the effects on both temperature distribution and relative humidity distribution of air inside the dryer. Unstructured meshes were used in the numerical simulation employing hexahedral meshing and tetrahedral meshing for mesh generation. The meshing strategies were evaluated through 2 size of cell i.e., 0.1 m and 0.05m. The results indicated that the size of cell have strong effect than the mesh type on the temperature profile and humidity of air inside the dryer. Thus, the results gave the engineers more options to select the optimum conditions for meshing and simulation the dryer.

scholarly journals NUMERICAL SIMULATION OF AIRFLOW AROUND VEHICLE MODELS

2018 ◽  
Vol 56 (3) ◽  
pp. 370
Author(s):  
Nguyen Van Thang ◽  
Ha Tien Vinh ◽  
Bui Dinh Tri ◽  
Nguyen Duy Trong
Keyword(s):  
Numerical Simulation ◽  
Kinetic Energy ◽  
Three Dimensional ◽  
Aerodynamic Characteristics ◽  
Aerodynamic Forces ◽  
Dissipation Energy ◽  
Ansys Fluent ◽  
Car Model ◽  
Airflow Field ◽  
Fluent Software

This article carries out the numerical simulation of airflow over three dimensional car models using ANSYS Fluent software. The calculations have been performed by using realizable k-e turbulence model. The external airflow field of the simplified BMV M6 model with or without a wing is simulated. Several aerodynamic characteristics such as pressure distribution, velocity contours, velocity vectors, streamlines, turbulence kinetic energy and turbulence dissipation energy are analyzed in this study. The aerodynamic forces acting on the car model is calculated and compared with other authors.

scholarly journals Comparison of RANS and scale-resolving approaches when modelling the turbulent flow behind a bluff body

2019 ◽  
Vol 196 ◽  
pp. 00036
Author(s):  
Svetlana V. Pogudalina ◽  
Natalya N. Fedorova ◽  
Svetlana A. Valger
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Calculation ◽  
Turbulent Flow ◽  
Bluff Body ◽  
Air Flow ◽  
Ansys Fluent ◽  
Fluent Software

In this paper, the results of a numerical simulation of the air flow in the vicinity of a parallelepiped fixed on a plate are presented. The 3D calculations were performed with the ANSYS Fluent software using scale-resolving DES approach. The obtained results are compared with the experimental data and with the results of the previous numerical calculation.

scholarly journals Collecting finely-dispersed particles from the gas flow in a centrifugal separator with coaxially arranged pipes

2020 ◽  
Vol 315 ◽  
pp. 03003
Author(s):  
Vadim E. Zinurov ◽  
Oksana S. Dmitrieva ◽  
Oksana S. Popkova
Keyword(s):  
Numerical Simulation ◽  
Pressure Loss ◽  
Software Package ◽  
Gas Flow ◽  
Scientific Paper ◽  
Centrifugal Separator ◽  
Centrifugal Forces ◽  
Ansys Fluent ◽  
Dispersed Particles ◽  
Fluent Software

The article deals with the problem of increasing the efficiency of dedusting the gas flow from the finely dispersed particles smaller than 10 μm. In order to solve this problem, a design of centrifugal separator with coaxially arranged pipes is proposed. The described principle of operation includes the large values of centrifugal forces, which take place inside the device when the flow is swirled, and these forces throw the finely dispersed particles to the walls of device. This scientific paper shows a numerical simulation of gas flow dedusting process by means of ANSYS Fluent software package. The efficiency of dedusting the gas from the finely dispersed particles of up to 10 μm in the device is on average within the range of 53.8–76.7%. The exponential function, describing the changes in the pressure loss from the input gas rate, is obtained. In the course of studies, it was found that the pressure loss in the device is not more than 800 Pa at the input gas rate from 3 to 19 m/s.

scholarly journals Research on the Interrelation between Temperature Distribution and Dry Band on Wet Contaminated Insulators

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4289
Author(s):  
Da Zhang ◽  
Fancui Meng
Keyword(s):  
Numerical Simulation ◽  
Temperature Distribution ◽  
Relative Humidity ◽  
Moisture Absorption ◽  
Maximum Temperature ◽  
Water Evaporation ◽  
Thermal Imager ◽  
Insulator Surface ◽  
The Law ◽  
Dry Bands

In this paper, the interrelation between temperature distribution and dry band on wet contaminated insulators is studied by theoretical analysis, numerical simulation, and a high-voltage artificial contamination experiment. The influences of the composition of the contaminant and the relative humidity of the environment on the moisture absorption of the contamination layer are studied. It is indicated that the critical relative humidity (CRH) of the soluble mixture in the contamination layer decreases with the increase of the variety of soluble substances. This can be considered as a previously neglected reason for the inconsistency between the result of an artificial contamination test and that of a natural contamination test. Furthermore, the influences of the maximum temperature, wind speed, altitude, relative humidity, and the composition of the contamination on the water evaporation rate of the contaminated layer are also studied. The formation of dry band is predicted by studying the law of water transport in the contamination layer. The influence of the location, width, drying degree, and quantity of dry bands on the insulator surface temperature are studied by numerical simulation. An infrared thermal imager and ultraviolet camera are adopted to measure the temperature distribution and the discharge phenomenon on the insulator surface separately, which verifies the above numerical simulation. The study results deepen the research on the moisture absorption characteristics, the law of temperature distribution, the formation of dry bands, and the influence of dry bands on the temperature distribution of wet contaminated insulators.

Numerical simulation of a flow past a triangular sail-type blade of a wind generator using the ANSYS FLUENT software package

2016 ◽  
Vol 61 (2) ◽  
pp. 299-301
Author(s):  
K. Kusaiynov ◽  
N. K. Tanasheva ◽  
L. L. Min’kov ◽  
B. R. Nusupbekov ◽  
Yu. O. Stepanova ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Software Package ◽  
Ansys Fluent ◽  
Wind Generator ◽  
Flow Past ◽  
Fluent Software

scholarly journals Removal of moisture from contaminated transformer oil in rectangular separators

2019 ◽  
Vol 110 ◽  
pp. 01026 ◽  
Author(s):  
Andrey Dmitriev ◽  
Vadim Zinurov ◽  
Dang Vinh ◽  
Oksana Dmitrieva
Keyword(s):  
Numerical Simulation ◽  
Separation Efficiency ◽  
Transformer Oil ◽  
Ansys Fluent ◽  
Oil Emulsion ◽  
Numerical Studies ◽  
Emulsion Separation ◽  
Fluent Software ◽  
Object Of Study ◽  
Geometrical Dimensions

This paper deals with the removal of moisture from the contaminated transformer oil. Design of a rectangular separator and the results of water-oil emulsion separation are shown in this paper. The influence of different values of the separator height and the distance between the rows of elements on the emulsion separation efficiency was studied. In order to calculate the process of removing the moisture from transformer insulating oil, the multiphase Eulerian-Eulerian model “Volume of Fluid” with the number of phases equal to 2 was applied in ANSYS Fluent software package. K–ε turbulence model was used for the calculations. The results were obtained while solving the nonstationary issue. In the course of numerical simulation, the object of study was the transformer oil T-1500U, containing some water amount. The results of numerical simulation of water-oil emulsion separation in a rectangular separator are shown. In the course of numerical studies, it was found that the use of a rectangular separator in order to remove the moisture from transformer oil allows it to be purified from water by 99.99%, providing that the geometrical dimensions of device are chosen correctly. The use of developed rectangular separator can be an alternative to the use of decanting tanks, various separators and other purification devices, which have extremely low rate of purification of contaminated spent oils. This separator allows purifying the transformer oil from water with a speed of 1-2 m/s while the efficiency is equal to 99.99%.

scholarly journals Capacities and Limitations of Wind Tunnel Physical Experiments on Motion and Dispersion of Different Density Gas Pollutants

2017 ◽  
Vol 17 (2) ◽  
pp. 53-60 ◽  
Author(s):  
Ondřej Zavila ◽  
Tomáš Blejchař
Keyword(s):  
Numerical Simulation ◽  
Froude Number ◽  
Physical Nature ◽  
Similarity Criteria ◽  
Wind Tunnels ◽  
Ansys Fluent ◽  
Physical Similarity ◽  
Physical Experiments ◽  
Fluent Software ◽  
Air Flow Velocity

Abstract The article focuses on the analysis of the possibilities to model motion and dispersion of plumes of different density gas pollutants in lowspeed wind tunnels based on the application of physical similarity criteria, in this case the Froude number. The analysis of the physical nature of the modeled process by the Froude number is focused on the influence of air flow velocity, gas pollutant density and model scale. This gives an idea of limitations for this type of physical experiments in relation to the modeled real phenomena. The resulting statements and logical links are exemplified by a CFD numerical simulation of a given task calculated in ANSYS Fluent software.

scholarly journals CFD numerical simulation of the indirect cooling system of an internal combustion engine

2017 ◽  
Vol 170 (3) ◽  
pp. 8-18
Author(s):  
Michał BIAŁY ◽  
Konrad PIETRYKOWSKI ◽  
Tytus TULWIN ◽  
Paweł MAGRYTA
Keyword(s):  
Numerical Simulation ◽  
Internal Combustion Engine ◽  
Cooling System ◽  
Initial Conditions ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Velocity Fields ◽  
Simulation Studies ◽  
Ansys Fluent ◽  
Fluent Software

The paper presents an analysis of the fluid flow in the cooling system of an internal combustion engine with oposite pistons.The purpose of the work was to optimize the flow of fluid through the channels located in the engine block. Simulation studies and subsequent iterations were performed using Ansys Fluent software. Two-equation k-epsilon turbulence model was used in the simulation model. Boundary and initial conditions were taken from previously made simulations conducted in AVL Boost software. The average wall temperature of the cylinder and the temperature of the outer walls of the cylinder were assumed for simulations. The results of the analyzes were graphically illustrated by the speed streamline distribution of velocity fields and temperature.

scholarly journals Numerical Simulation of Viscous Effects of Oil on the Capacity of Oil Booms

2019 ◽  
Vol 140 ◽  
pp. 06014
Author(s):  
Thai Thi Kim Chi
Keyword(s):  
Numerical Simulation ◽  
Loss Rate ◽  
Oil Spills ◽  
Shape Evolution ◽  
Viscous Effects ◽  
Ansys Fluent ◽  
Effective Response ◽  
Oil Boom ◽  
Fluent Software ◽  
Spilled Oil

The potential risk of oil spills is constantly increasing, which required special techniques, equipment and effective response plans as well. Oil booms is the most common equipment used for spilled oil clean-up. However, due to different reasons such as extreme hydrological conditions, unreasonable design or poor handling, the failure of booms can happen. The loss rate of boom is acceptable if it is small enough. In the present paper, the behavior of oil with different viscosity around the oil boom is numerically studied using ANSYS FLUENT software. The shape evolution of oil slicks is presented. The loss rates in given conditions are also determined.

scholarly journals Thermal Optimization and Comparison of Geometric Parameters of Rectangular and Triangular Fins with Constant Surfacing

2017 ◽  
Vol 63 (7-8) ◽  
pp. 439
Author(s):  
Florent Bunjaku ◽  
Risto V. Filkoski ◽  
Naser Sahiti
Keyword(s):  
Numerical Simulation ◽  
Heat Flux ◽  
Optimization Model ◽  
Physical Parameters ◽  
Ansys Fluent ◽  
Fin Efficiency ◽  
Cutting Surface ◽  
Optimal Value ◽  
Fluent Software ◽  
Optimal Values

This paper presents an optimization model of fins of rectangular and triangular profiles, based on a constant value of the transverse cutting surface, as well as the optimization of the ratio of efficiency of both fin profiles. The optimization model is based on the analytical and numerical simulation of the heat flux through fins in order to derive relevant thermo-physical parameters of the investigated fin profiles. The optimization of both fin profiles is carried out for different fin materials based on constant heat transfer coefficient and for different fin materials based on variable heat flux. The efficiency of fins as relevant fin goodness parameter is also analysed and the optimal values of the ratio of fin efficiency of both profiles is graphically presented and the optimal value estimated. Numerical simulation of fin models is carried out by using ANSYS/Fluent software.

Sign in / Sign up

Export Citation Format

Share Document