Journal ArticleDOI
Effect of tube shape on the hydrodynamics and tube-to-bed heat transfer in fluidized beds
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TLDR
In this article, the effects of different tube shapes on the flow characteristics and local heat transfer coefficients are investigated and the time-averaged heat-transfer coefficient is compared with the experimental data in the literature.About:
This article is published in Applied Thermal Engineering.The article was published on 2013-10-02. It has received 37 citations till now. The article focuses on the topics: Heat transfer coefficient & Heat transfer.read more
Citations
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Journal ArticleDOI
Heat transfer enhancement using different types of vortex generators (VGs): A review on experimental and numerical activities
Muhammad Awais,Arafat A. Bhuiyan +1 more
TL;DR: In this paper, the authors present a comprehensive review on heat transfer augmentation and pressure loss reduction of compact heat exchanger (CHXs) by using interrupted surfaces in the form of vortex generators (VGs).
Journal ArticleDOI
Parallel LES-DEM simulation of dense flows in fluidized beds
TL;DR: In this paper, a parallelization strategy for the Discrete Element Method (DEM) applied to simulate dense flows in fluidized beds and combined with the Large-eddy Simulation (LES) is presented.
Journal ArticleDOI
Computational modeling of airflow and heat transfer in a vented box during cooling: Optimal package design
TL;DR: In this paper, a computational fluid dynamics (CFD) model is developed to study the airflow patterns and heat transfer inside an existing container and a newly developed container, which employs an unsteady-state approach based on a two-equation eddy-viscosity turbulence model (SST-κ-ω model).
Journal ArticleDOI
3D particle-scale modeling of gas–solids flow and heat transfer in fluidized beds with an immersed tube
TL;DR: In this article, a 3D model of combined computational fluid dynamics and discrete element method (CFD-DEM) is developed to study the gas-solids flow and heat transfer in fluidized beds with an immersed tube.
Journal ArticleDOI
Comprehensive investigation and comparison of TFM, DenseDPM and CFD-DEM for dense fluidized beds
TL;DR: In this paper, the authors compare the two-fluid model (TFM), the Dense Discrete Phase Model (DDPM), and the Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) with respect to a comprehensive independency study, a sensitivity analysis of the respective submodels and model parameters, a comparison of the simulation results between the different modeling approaches, as well as their computational demand.
References
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Journal ArticleDOI
An overview of fast pyrolysis of biomass
TL;DR: In this paper, the authors review the design considerations faced by the developers of fast pyrolysis, upgrading and utilisation processes in order to successfully implement the technologies and provide a case study of the application of the technology to waste wood and how this approach gives very good control of contaminants.
Journal ArticleDOI
Transfer of heat or mass to particles in fixed and fluidised beds
TL;DR: In this article, a quantitative analysis of particle to fluid heat transfer on the basis of a stochastic model of the fixed bed leads to a constant value of the Nusselt group at low Reynolds number.
Journal ArticleDOI
Mechanism of heat transfer to fluidized beds
H. S. Mickley,D. F. Fairbanks +1 more
TL;DR: In this paper, the heat transfer coefficients obtained with fluidized beds are found to be proportional to the square root of the thermal conductivity of the quiescent beds, which indicates that the process controlling fluidized heat transfer may be considered to be an unsteady-state diffusion of heat into mobile elements of quiesent bed material.
Journal ArticleDOI
Numerical calculation of wall‐to‐bed heat‐transfer coefficients in gas‐fluidized beds
TL;DR: In this article, a computer model for a hot gas-fluidized bed has been developed based on a TFM approach in which both phases are considered to be continuous and fully interpenetrating, and local wall-to-bed heat-transfer coefficients have been calculated by the simultaneous solution of the TFM conservation of mass, momentum and thermal energy equations.
Journal ArticleDOI
Hydrodynamics of fluidization: Prediction of wall to bed heat transfer coefficients
Madhava Syamlal,Dimitri Gidaspow +1 more
TL;DR: In this paper, a computer model for a hot fluidized bed was developed and the large heat transfer coefficients characteristic of fluidized beds were computed without an enhancement of heat transfer by turbulence.
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