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Journal : Proceedings Conference on Marine Engineering and its Application

Studi Numerik Pengaruh Sudut Kemiringan Push Nozzle pada Air Curtain Terhadap Pola Aliran Push-Pull Ventilation Muhammad Rafli Syahrizal R; Burniadi Moballa; Agung Purwana
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2675

Abstract

COVID-19 cases will continue to spread throughout the world until 2023, including inIndonesia, and have many negative impacts, especially for the industrial world because it is difficultto enforce a minimum distance of 1-2 meters between employees. One technology that has highpotential to be applied is the air curtain. This journal analyzes push-pull ventilation to protectworkers from microdroplet inhalation. In this study, two variations of the push-pull ventilation speedratio (Vs/Vb) were used, namely 4 and 6. As well as using a variation of the push nozzle slope, namely10°. In this study, running was carried out with two models, namely modeling without a mannequinand with a mannequin. To complete this research, simulations were carried out using theComputational Fluid Dynamics (CFD) method using Salome, OpenFOAM, and ParaView software.So, the results obtained in modeling without a mannequin, the speed ratio of 6 is the most optimalratio with the least amount of average discharge that goes out of bounds, namely 0.582 m3/s. Whilethe results of the push-pull modeling with the mannequin show that no droplets penetrate the aircurtain at all variations of the velocity ratio, the velocity ratio of 6 is the velocity ratio that has aover-blow flow pattern that is very effective in holding down spray from droplets.
Kajian Numerik Pengaruh Push dan Pull Velocity terhadap Pola Aliran Pada Downward Push-Pull Air Curtain Piero Wahyu Iskandar; Burniadi Moballa; Muh Anis Mustaghfirin
Proceedings Conference on Marine Engineering and its Application Vol 6 No 1 (2023): Conference on Marine Engineering and its Aplication
Publisher : Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/cmea.v6i1.2686

Abstract

Transmission of COVID-19 is still increasing in the world, such as in China andIndonesia. One of the reasons for the increasing number of positive cases of COVID-19 isthe occurrence of transmission from industrial clusters, the implementation of a minimumsocial distancing of 1 to 2 meters between workers is difficult to do. This is due to limitationsin layout, area, and industrial work systems. Thus, a system is needed to protect industrialworkers from potential exposure to COVID-19. One technology that has high potential to beapplied is air curtain. From these problems, this research will carry out an analysis of theoptimum push-pull discharge and air velocity, and the regime map for downward push-pullair curtain, the method used to carry out the analysis is Computional Fluid Dynamics (CFD)where the stages of the CFD process are preprocessing, processing, postprocessing. Thesoftware used to complete this final project is SALOME for the preprocessing,, OpenFOAMfor the processing, and for the postprocessing stage using ParaView. From the simulationresults that have been carried out, the results show that at a nozzle blow speed of 6,24 m/s,with a suction nozzle speed of 37,44 m/s, these are the optimum blow speed and suction nozzlevalues and are able to withstand droplet dispersion.