scholarly journals Solar protection influence on dynamic insulation efficiency of double skin façades

2019 ◽  
Vol 85 ◽  
pp. 04003
Author(s):  
Nelu-Cristian Cherecheş ◽  
Cătălin George Popovici ◽  
Vasile Valerică Cîrlan ◽  
Sebastian Valeriu Hudişteanu
Keyword(s):  
Numerical Analysis ◽  
Flow Velocity ◽  
Forced Convection ◽  
Air Velocity ◽  
Ansys Fluent ◽  
Thermodynamic Behaviour ◽  
Dynamic Insulation ◽  
Fluent Software ◽  
Double Skin ◽  
Double Skin Facades

The objective of the study was to perform a numerical analysis in order to determine the best position for placing sunscreen inside the channel of a double skin façade insulation relative to dynamic insulation efficiency, using ANSYS-Fluent software. The analysis was performed for summer conditions in forced convection for two airspeed regimes inside the channel: 0.2m/s and respectively 0.5m/s. Regime is considered permanent and the only parameter changed is the position of the blinds in the channel. Results are shown by spectra and profiles of temperature and velocity in order to analyse thermodynamic behaviour of a double skin façade. The numerical results emphasize that effectiveness of sunscreen such as blinds, is proportional to the flow velocity inside the channel and inversely proportional to the distance from the outer glazing. Ranked as the most effective sun protection is when it is located at the outer glazing and air velocity at the entrance is 0.5m/s.

scholarly journals Comparative analysis between methane and hydrogen regarding ignition and combustion in diffusive mode

2021 ◽  
Vol 327 ◽  
pp. 01001
Author(s):  
Lucian Mihăescu ◽  
Dorin Stanciu ◽  
Gheorghe Lăzăroiu ◽  
Ionel Pîșă ◽  
Gabriel Negreanu
Keyword(s):  
Comparative Analysis ◽  
Numerical Modelling ◽  
Flow Velocity ◽  
Methane Combustion ◽  
Ansys Fluent ◽  
Gas Jets ◽  
Combustible Gas ◽  
Fluent Software ◽  
Burner Design ◽  
Ignition And Combustion

The hydrogen is expected to become the energy vector of the future. If for environmental protection this concept it is obvious, the data for the design of hydrogen combustion facilities are still insufficient. This paper discusses the fundamental actions related to the design of a hydrogen burner. Numerical modelling researches using the Ansys-Fluent software has shown the link between the flow velocity in combustible gas jets together with the required air and the combustion rates. Combustion models (both analytical and numerical) allowed finding the optimal ratios between the two specified velocities (combustion and flow) compared to those for methane combustion, correlated also with the classical directions and recommendations for the burner design.

An Investigation of the Effect of interrupted fin arrangements on the Thermal Performance of a Heat Sink under a Free Convection Condition

2019 ◽  
Vol 7 (1) ◽  
pp. 43-53
Author(s):  
Abbas Jassem Jubear ◽  
Ali Hameed Abd
Keyword(s):  
Heat Transfer ◽  
Steady State ◽  
Natural Convection ◽  
Thermal Performance ◽  
Heat Sink ◽  
Numerical Study ◽  
Ansys Fluent ◽  
Fluent Software ◽  
Steady State Heat ◽  
Steady State Heat Transfer

The heat sink with vertically rectangular interrupted fins was investigated numerically in a natural convection field, with steady-state heat transfer. A numerical study has been conducted using ANSYS Fluent software (R16.1) in order to develop a 3-D numerical model.  The dimensions of the fins are (305 mm length, 100 mm width, 17 mm height, and 9.5 mm space between fins. The number of fins used on the surface is eight. In this study, the heat input was used as follows: 20, 40, 60, 80, 100, and 120 watts. This study focused on interrupted rectangular fins with a different arrangement and angle of the fins. Results show that the addition of interruption in fins in various arrangements will improve the thermal performance of the heat sink, and through the results, a better interruption rate as an equation can be obtained.

Numerical analysis of square concrete-filled double skin steel tubular columns with rubberized concrete

Structures ◽  
2021 ◽  
Vol 32 ◽  
pp. 1026-1047
Author(s):  
Pouria Ayough ◽  
Zainah Ibrahim ◽  
N.H. Ramli Sulong ◽  
Po-Chien Hsiao ◽  
Mohamed Elchalakani
Keyword(s):  
Numerical Analysis ◽  
Rubberized Concrete ◽  
Tubular Columns ◽  
Double Skin

Research on the Impacts of Screw Speed on All-Metal Screw Pump

2014 ◽  
Vol 703 ◽  
pp. 425-429
Author(s):  
Jun Fei Wu ◽  
Zhi Li ◽  
Fan Guo Meng ◽  
Ben Liang Yu
Keyword(s):  
Geometric Model ◽  
Constraint Condition ◽  
3D Flow ◽  
Screw Speed ◽  
Ansys Fluent ◽  
Screw Pump ◽  
Single Screw ◽  
Dynamic Mesh Technique ◽  
Fluent Software ◽  
Mesh Technique

Compared with traditional screw pump,all-metal screw pump have more advantages in the oil extraction. In this paper, all-metal single screw pump's geometric model was made by PROE software; then the dynamic mesh technique was applied to mesh the model and constraint condition was applied in the ANSYS-FLUENT software. 3D flow field was numerical analyzed In that software, the impacts of screw speed on volume flow and volumetric efficiency were concluded, the conclusion can offer some valuable guidances to the all-metal single screw pump's design.

Predicting airflow in naturally ventilated double-skin facades: Theoretical analysis and modelling

2021 ◽  
Author(s):  
Yao Tao ◽  
Xiang Fang ◽  
Michael Yit Lin Chew ◽  
Lihai Zhang ◽  
Jiyuan Tu ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Double Skin ◽  
Double Skin Facades
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