Eine hydrodynamische Studie �ber die Wasserstrahlzerstreuung von fl�ssigen Spr�hern

Tebbal, Mohamed; Mzad, Hocine

doi:10.1007/s10010-003-0118-3

Cited by 11 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They found that the average and maximum velocity data are considerably overestimated by the Nusselt theory, while the film thickness data is slightly underestimated. Tebbal and Mzad [12] experimentally studied the profiles of water jets under liquid sprayers on flat surfaces; correlations were established and compared to the data found. Mzad and Tebbal [13] carried out a simulation for eight different sprayers in the pressure range of the ejected fluid, lying between 1 and 3 bars.…”

Section: Introductionmentioning

confidence: 99%

“…We used a new approach to measure the velocity of the fluid; by statistical processing, we linked the velocity profile to the flow rate. By using the correlations of Tebbal and Mzad [12] parameterizing the jet impacting a horizontal plate, we established a relation linking the thickness of the film to the geometric and hydrodynamic characteristics of the sprayer.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Archive of Mechanical Engineering

Elmahi,

Baki,

Tebbal

2021

View full text Add to dashboard Cite

Optimization of cooling systems is of major importance due to the economy of cooling water and energy in thermal installations in the industry. The hydrodynamic study of the film is a prerequisite for the study of the intensity of the heat transfer during the cooling of a horizontal plate by a liquid film. This experimental work made it possible to quantify the hydrodynamic parameters by a new approach, a relation linking the thickness of the film to the velocity was found as a function of the geometrical and hydrodynamic characteristics of the sprayer.A new statistical approach has been developed for the measurement of the velocity, the liquid fluid arriving at the edge of the plate and having velocity V is spilled out like a projectile. The recovering of the liquid in tubes allowed us to quantify flow rates for different heights positions relative to the plate, statistical processing permitted us to assess the probable velocity with a margin of error.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Archive of Mechanical Engineering

Elmahi,

Baki,

Tebbal

2021

View full text Add to dashboard Cite

show abstract

“…Since 2004, research has been carried out on the nozzle technology and its use in cooling highly heated surfaces. Hydrodynamic and thermal studies have been the subject of several articles published to date [4][5][6][7]. Based on hydrodynamic and geometrical parameters, experiments lead to an empirical correlation defining the profile of fluid dispersion beneath liquid sprayers.…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Mzad,

Otmani

2020

View full text Add to dashboard Cite

As in many thermal processing technologies, there is a delicate balance between productivity and quality during ingot cooling process. Higher cooling velocities increase productivity but also create higher temperature gradients inside the ingot. Such a fast cooling does not leave sufficient time to establish the equilibrium within the solid, thus the final metal structure is strongly affected by the set up cooling mode throughout the liquid metal solidification. The first intention in this paper is to compare between three cooling modes in order to identify the required mode for a continuous casting process. Then, we study the influence of heat transfer coefficient on metal liquid-to-solid transition through the spray-cooled zone temperature and the metal latent heat of solidification. A gray iron continuous casting process subjected to water-sprays cooling was simulated using the commercial software for modeling and simulating multiphysics and engineering problems. The primary conclusions, from the obtained results, show the forcefulness of water spray cooling regarding standard cooling. Afterward, we highlight the great influence of heat transfer coefficient on the location of transition region as well as the relationship between heat transfer coefficient, wall outer temperature, latent heat dissipation, and the solidification time.

show abstract

“…Water is used to cool the mould in the initial stages of solidification, and then below the mould, where it is in direct contact with the newly solidified surface of the metal. A study by Tebbal and Mzad [2], that contributes to obtain a better quality of metal and steel with a possible minimum of energy and water expenses, lead to an empirical correlation defining the dispersion profile of a water jet beneath liquid sprayers.…”

Section: Introductionmentioning

confidence: 99%

A model of water-spray cooling effect on a continuous casting process

et al. 2018

View full text Add to dashboard Cite

The intention of this study is to give an idea about the influence of water-spray cooling on the solidification process of the liquid metal which enables to locate the shear region. The effect of spray heat transfer coefficient (hspray) during the liquid-to-solid transition through the cooled zone temperature and the metal latent heat of solidification are highlighted. A gray iron continuous casting process subjected to water-sprays cooling was simulated using the commercial code COMSOL MULTIPHYSICS 5.2. The obtained results show the great influence of hspray on the location of transition region as well as the relationship between hspray, wall outer temperature, latent heat dissipation, and the solidification time.

show abstract

Eine hydrodynamische Studie �ber die Wasserstrahlzerstreuung von fl�ssigen Spr�hern

Cited by 11 publications

References 4 publications

Archive of Mechanical Engineering

Archive of Mechanical Engineering

Archives of Thermodynamics

A model of water-spray cooling effect on a continuous casting process

Contact Info

Product

Resources

About