Publication result detail

CFD modelling of an initial powdery layer on cooled tubular surfaces

STROUHAL, J.; JUŘENA, T.; JEGLA, Z.

Original Title

CFD modelling of an initial powdery layer on cooled tubular surfaces

English Title

CFD modelling of an initial powdery layer on cooled tubular surfaces

Type

WoS Article

Original Abstract

Fouling in convective parts of boilers is typical of the deposition of solid particles and condensable inorganic vapours. Particle sticking is caused mainly by gravity, adhesion, or the presence of a sticky liquid film of condensed vapours. Aside from the local conditions, particle properties and size determine whether they are sticking on the surface. This work focuses on simulations of particulate matter fouling of cooled tubes by fly ash produced by the combustion of industrial waste and sewage sludge mixture. Boundary conditions including the flue gas and particle flow rate are derived from combustion tests. Particle properties and size distribution are obtained from literature. The goal is to provide a basis for further modelling of the development of large deposits in tube bundles observed during a test on the experimental facility. Neither the combustion nor fly ash development is modelled. Their transport and deposition are simulated. Fixed boundary conditions are set for both the particulate and gas phases. The influence of already deposited particles on the surface mechanical properties and roughness is included to capture their deposition. The fly ash particles are considered completely solidified, considering the low flue gas temperatures on the facility inlet.

English abstract

Fouling in convective parts of boilers is typical of the deposition of solid particles and condensable inorganic vapours. Particle sticking is caused mainly by gravity, adhesion, or the presence of a sticky liquid film of condensed vapours. Aside from the local conditions, particle properties and size determine whether they are sticking on the surface. This work focuses on simulations of particulate matter fouling of cooled tubes by fly ash produced by the combustion of industrial waste and sewage sludge mixture. Boundary conditions including the flue gas and particle flow rate are derived from combustion tests. Particle properties and size distribution are obtained from literature. The goal is to provide a basis for further modelling of the development of large deposits in tube bundles observed during a test on the experimental facility. Neither the combustion nor fly ash development is modelled. Their transport and deposition are simulated. Fixed boundary conditions are set for both the particulate and gas phases. The influence of already deposited particles on the surface mechanical properties and roughness is included to capture their deposition. The fly ash particles are considered completely solidified, considering the low flue gas temperatures on the facility inlet.

Keywords

Fouling; deposit; CFD; modelling; tube bundle; particulate matter; waste; fly ash

Key words in English

Fouling; deposit; CFD; modelling; tube bundle; particulate matter; waste; fly ash

Authors

STROUHAL, J.; JUŘENA, T.; JEGLA, Z.

RIV year

2025

Released

29.06.2023

Publisher

SPRINGER

Location

NEW YORK

ISBN

0947-7411

Periodical

HEAT AND MASS TRANSFER

Volume

60

Number

5

State

Federal Republic of Germany

Pages from

807

Pages to

815

Pages count

9

URL

https://link.springer.com/article/10.1007/s00231-023-03390-8

BibTex

@article{BUT184199,
  author="Jiří {Strouhal} and Tomáš {Juřena} and Zdeněk {Jegla}",
  title="CFD modelling of an initial powdery layer on cooled tubular surfaces",
  journal="HEAT AND MASS TRANSFER",
  year="2023",
  volume="60",
  number="5",
  pages="807--815",
  doi="10.1007/s00231-023-03390-8",
  issn="0947-7411",
  url="https://link.springer.com/article/10.1007/s00231-023-03390-8"
}