Investigation of the particle size influence over the behavior of aerosol free jets based on CFD-Eulerian simulations

Kranzfeld, Leonardo da Silva; Mitre, João Felipe; Nichele, Jakler

doi:10.34117/bjdv6n7-695

Cited by 1 publication

(1 citation statement)

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“…Da Silva Kranzfeld et al proposed general conditions for the simulation of an aerosol jet in the air based on the Eulerian approach. The effect of the particle diameter on dispersion has been investigated [16].…”

Section: Literature Survey Concerning Numerical Simulations Of Spray ...mentioning

confidence: 99%

Thermal Hydraulics Simulation of a Water Spray System for a Cooling Fluid Catalytic Cracking (FCC) Regenerator

Davidy

2023

Dynamics

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Olefins are crucial building blocks for petrochemical industry, serving as raw materials for the production of various products such as plastics, synthetic fibers, detergents, solvents, and other chemicals. In FCC, heavy petroleum feedstocks are injected into a catalytic cracking unit, where they are mixed with a catalyst. The catalyst aids in breaking down the large hydrocarbon molecules into smaller fragments, including olefins like Propylene and Ethylene. These polymerization reactions occur at high temperatures. They demand that heat removal occurs as quickly as possible in order to control the reactor temperature and to avoid “hot spots” in the Regenerator or localized oxidation reactions (and to avoid creep rupture of the regenerator steel cladding). The cooling of the regenerator cladding surface can be achieved by impinging water droplets (spray), ejected from a spray nozzle. Spray cooling can provide uniform cooling and handle high heat fluxes in both a single phase and two phases. This research provides a thermal hydraulic design of regenerator spray cooling systems. In the framework of this research, Fire Dynamics Simulator (FDS) software was applied in order to simulate the temperature field and the water vapor mass fraction. A COMSOL Multiphysics finite element code was used in order to calculate the temperature field inside the regenerator cladding. The calculated surface temperatures and heat transfer convective coefficient, obtained using FDS software, were validated successfully against COMSOL numerical results and previous results in the literature. The numerical simulations were carried out for two cases. The first case was carried out at a distance of 0.5 m, and the second case was carried out at a distance of 0.2 m. A grid sensitivity study was carried out on the FDS model. Numerical integrations were carried out over time in order to calculate the average temperatures. The difference between these four average temperatures, calculated by applying different grids, is less than 7.4%. The calculated surface temperatures and heat transfer convective coefficient were validated successfully against COMSOL numerical results and previous research. It was shown that the calculated temperatures decrease in the second case. The water spray system managed to cool the steel wall more effectively as the water spray system approaches the steel cladding.

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Section: Literature Survey Concerning Numerical Simulations Of Spray ...mentioning

confidence: 99%

Thermal Hydraulics Simulation of a Water Spray System for a Cooling Fluid Catalytic Cracking (FCC) Regenerator

Davidy

2023

Dynamics

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Investigation of the particle size influence over the behavior of aerosol free jets based on CFD-Eulerian simulations

Abstract: Investigation of the particle size influence over the behavior of aerosol free jets based on CFD-Eulerian simulations Investigação da influência do tamanho da partícula sobre o comportamento de jatos livres de aerossol baseada em simulações de CFD Euleriano

Cited by 1 publication

References 38 publications

Thermal Hydraulics Simulation of a Water Spray System for a Cooling Fluid Catalytic Cracking (FCC) Regenerator

Thermal Hydraulics Simulation of a Water Spray System for a Cooling Fluid Catalytic Cracking (FCC) Regenerator

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