Search Results - "Dehbi, A."

A generalized correlation for steam condensation rates in the presence of air under turbulent free convection by Dehbi, A.

“…In the past several decades, experimentalists have proposed a large number of correlations to estimate steam condensation rates in the presence of…”
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Correcting for tube curvature effects on condensation in the presence of a noncondensable gas in laminar regimes by Dehbi, A.

“…•Study focuses on condensation over a vertical tube with noncondensable gas present.•Model predicts enhancement of condensation heat transfer due to tube…”
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Correcting for tube curvature effects on condensation in the presence of a noncondensable gas in turbulent free convection by Dehbi, A.

“…•Study focuses on condensation over a vertical tube with noncondensable gas present.•Heat rate predictions validated against experimental data for two tube…”
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Out-of-sample validation of a general correlation for steam condensation in the presence of air over a vertical slender tube in turbulent free convection by Dehbi, A.

“…In a previous work [Dehbi, 2015], a general correlation was proposed for the prediction of steam condensation rates in the presence of air over vertical flat…”
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Corrigendum to “Correcting for tube curvature effects on condensation in the presence of a noncondensable gas in turbulent free convection” [Int. J. Heat Mass Transf. 164 (2021) 120594] by Dehbi, A.

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A unified correlation for steam condensation rates in the presence of air–helium mixtures under naturally driven flows by Dehbi, A.

“…•Correlation developed for condensation rates of steam in air–helium mixtures.•Database consists of four consolidated works conducted in last two decades.•Form…”
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Turbulent particle dispersion in arbitrary wall-bounded geometries: A coupled CFD-Langevin-equation based approach by Dehbi, A.

“…A Lagrangian continuous random walk (CRW) model is developed to predict turbulent particle dispersion in arbitrary wall-bounded flows with prevailing…”
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On the adequacy of wall functions to predict condensation rates from steam-noncondensable gas mixtures by Dehbi, A.

“…•Work investigates the effect of near-wall mesh resolution on CFD predictions.•Case study: turbulent condensation in the presence of noncondensable gases.•Wall…”
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A CFD model for particle dispersion in turbulent boundary layer flows by Dehbi, A.

“…In Lagrangian particle dispersion modeling, the assumption that turbulence is isotropic everywhere yields erroneous predictions of particle deposition rates on…”
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Prediction of Extrathoracic Aerosol Deposition using RANS-Random Walk and LES Approaches by Dehbi, A.

“…Computational Fluid Dynamics (CFD) has emerged as a powerful and economical alternative to empiricism in the prediction of aerosol deposition inside the…”
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Prediction of steam condensation in the presence of noncondensable gases using a CFD-based approach by Dehbi, A., Janasz, F., Bell, B.

“…► A model of condensation with noncondensable gases is integrated in the Fluent code. ► Condensation is modeled as sink terms in the conservation equations. ►…”
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Validation against DNS statistics of the normalized Langevin model for particle transport in turbulent channel flows by Dehbi, A.

“…A hybrid Lagrangian–Eulerian approach is proposed to simulate heavy particle dispersion in turbulent channel flow. The mean flow is provided by the Eulerian…”
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CFD simulation of hydrogen mitigation by a passive autocatalytic recombiner by Halouane, Y., Dehbi, A.

“…•CFD simulations of H2 mitigation by a Passive Autocatalytic Recombiner are presented.•Simulated tests are OECD THAI-HR2 (ambient pressure) and THAI-HR5 (high…”
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The influence of thermal radiation on the free convection inside enclosures by Dehbi, A., Kelm, S., Kalilainen, J., Mueller, H.

“…•Thermal radiation may have a significant influence on containment flow fields.•Paper addresses two cases: participating and non-participation media.•CFD…”
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Erosion of a helium-rich layer by a steam jet in the presence of an inclined grid: Comparison of the predictions by URANS, STRUC-URANS and LES by Dehbi, A., King, S., Mitrakos, D.

“…•We simulate with CFD a test featuring light gas layer erosion by a steam jet.•Test set-up includes an inclined grid obstruction which deflects the steam…”
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Large Eddy simulations of particulate flows inside a square differentially heated cavity at Rayleigh numbers up to 1011 by Aksouh, M., Dehbi, A.

“…The Differentially Heated Cavity (DHC) has often served as a suitable geometric model for naturally driven particulate flows inside closed volumes. While…”
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Preparation and Characterization of New Soluble and Thermally Stable Polyazomethine by Polycondensation of Thiophene-2,5-dicarboxaldehyde and Ortho-tolidine for Optoelectronics by Bekri, I., Gherras, H., Dehbi, A., Belfedal, A.

“…In recent years, there has been considerable interest in conducting polymeric materials containing conjugated bonds. Imine polymers, in which nitrogen atoms…”
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A stochastic Langevin model of turbulent particle dispersion in the presence of thermophoresis by Dehbi, A.

“…Direct numerical simulation (DNS) and experimental data have shown that inertial particles exhibit concentration peaks in isothermal turbulent boundary layers,…”
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CFD Simulation of Particle-Laden Flow in a 3D Differentially Heated Cavity Using Coarse Large Eddy Simulation by Sayed, M. A., Dehbi, A., Hadžiabić, M., Ničeno, B., Mikityuk, K.

“…Particulate flow in closed space is involved in many engineering applications. In this paper, the prediction of particle removal is investigated in a thermally…”
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RANS modeling for particle transport and deposition in turbulent duct flows: Near wall model uncertainties by Jayaraju, S.T., Sathiah, P., Roelofs, F., Dehbi, A.

“…•Near-wall modeling uncertainties in the RANS particle transport and deposition are addressed in a turbulent duct flow.•Discrete Random Walk (DRW) model and…”
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