A Quasi-1D Model of Biomass Co-Firing in a Circulating Fluidized Bed Boiler

Beneš, Michal; Strachota, Pavel; Maca, Radek; Havlena, Vladimı́r; Mach, Jan

doi:10.1007/978-3-319-05591-6_79

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…CFBSim is a quasi-1D solver originally developed for biomass cofiring in a circulating fluidized bed boiler. The employed model is based on the work of Gidaspow [7] and it was developed for industrial purposes in collaboration with Honeywell corp. (see [4]). For the purpose of this paper, it was modified for the geometry of the combustion chamber depicted in Fig.…”

Section: 3mentioning

confidence: 96%

“…1 and equations responsible for combustion processes were deactivated. The model solves Euler equations [4] instead of Navier-Stokes equations described in Mathematical model section. All conservative laws are reformulated in 1D along the vertical profile of the combustion chamber and its horizontal variable cross-section denoted by A(x), where x is the elevation, is taken into account.…”

Section: 3mentioning

confidence: 99%

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Numerical simulation of fluidization for application in oxyfuel combustion

Beneš¹,

Eichler²,

Klinkovský³

et al. 2021

Discrete &Amp; Continuous Dynamical Systems - S

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This paper is concerned with the simulation of multiphase flow hydrodynamics in an experimental oxyfuel fluidized bed combustor designed for biomass fuels. The aim is to perform cross-validation between several models and solvers that differ in the description of some phenomena in question. We focus on the influence of turbulence modeling, inter-phase drag force models, the presence of biomass in the mixture. Also the possibility to simplify the full 3D description to a quasi-1D model is tested. However, the results indicate that such simplification is not suitable for chaotic phenomena in considered scenarios. The models were developed using ANSYS Fluent and OpenFOAM CFD software packages as well as our in-house CFD code CFBSim. The quantities relevant for comparison (the densities of the dispersed solid phases and the phase velocities) are presented in the form of cross-section averaged vertical profiles.

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Section: 3mentioning

confidence: 96%

Section: 3mentioning

confidence: 99%

Numerical simulation of fluidization for application in oxyfuel combustion

Beneš¹,

Eichler²,

Klinkovský³

et al. 2021

Discrete &Amp; Continuous Dynamical Systems - S

Self Cite

View full text Add to dashboard Cite

show abstract

“…Using FVM to solve problems involving, e.g., reacting multiphase flows [8,9], the number of necessary evaluations of computationally costly terms in the governing equations can be reduced by using polyhedral meshes. In the CFD domain, the properties of polyhedral meshes and their possible advantages, in terms of convergence rate and computational costs, have recently started to be investigated systematically [10][11][12][13], and their support is available in popular packages, such as ANSYS Fluent, OpenFOAM [14] or AVL FIRE.…”

Section: Introductionmentioning

confidence: 99%

GTMesh: A Highly Efficient C++ Template Library for Numerical Schemes on General Topology Meshes

Jakubec,

Strachota

2023

Applied Sciences

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This article introduces GTMesh, an open-source C++ library providing data structures and algorithms that facilitate the development of numerical schemes on general polytopal meshes. After discussing the features and limitations of the existing open-source alternatives, we focus on the theoretical description of geometry and the topology of conforming polytopal meshes in an arbitrary-dimensional space, using elements from graph theory. The data structure for mesh representation is explained. The main part of the article focuses on the implementation of data structures and algorithms (computation of measures, centers, normals, cell coloring) by using State-of-the-Art template metaprogramming techniques for maximum performance. The geometrical algorithms are designed to be valid regardless of the dimension of the underlying space. As an integral part of the library, a template implementation of class reflection in C++ has been created, which is sufficiently versatile and suitable for the development of numerical and data I/O algorithms working with generic data types. Finally, the use of GTMesh is demonstrated on a simple example of solving the heat equation by the finite volume method.

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A Quasi-1D Model of Biomass Co-Firing in a Circulating Fluidized Bed Boiler

Cited by 2 publications

References 13 publications

Numerical simulation of fluidization for application in oxyfuel combustion

Numerical simulation of fluidization for application in oxyfuel combustion

GTMesh: A Highly Efficient C++ Template Library for Numerical Schemes on General Topology Meshes

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