Experimental validation of a frequency domain BEM model to study 2D and 3D heat transfer by conduction

Simões, I.; Simões, N.; Tadeu, A.; Reis, Marcelo de Miranda; Vasconcellos, Carlos Alexandre Bastos de; Mansur, Webe João

doi:10.1016/j.enganabound.2012.05.007

Cited by 10 publications

(4 citation statements)

References 30 publications

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“…How to improve efficiency in thermal field numerical simulation while maintaining accuracy? Various numerical methods have been developed to solve this problem, including the finite element method (FEM) [5][6][7][8], virtual element method (VEM) [9], composite element method (CEM) [10][11][12], boundary element method (BEM) [13], and singular boundary method (SBM) [14]. Among the methods mentioned earlier, the finite element method is the most widely applied method to simulate the cooling system.…”

Section: Introductionmentioning

confidence: 99%

Simulation of thermal field in mass concrete with cooling pipes based on the isogeometric analysis method

Li,

Chen,

Zhu

2024

Front. Phys.

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As the water pipe cooling system is widely applied to controlling temperature in mass concrete structures, the precise simulation of the temperature field in mass concrete with cooling pipes embedded is meaningful. This paper presents an isogeometric analysis (IGA) with NURBS for heat transfer in mass concrete with consideration of the cooling pipe. The proposed method not only achieves the same level of accuracy with fewer nodes but also eliminates the time-consuming process of mesh in the traditional FEM. The coarsest parameter space which depicts small pipe and large concrete precisely is constructed to create an efficient model for numerical computation. In addition, the unique k-refinement in IGA is supposed to be the most appropriate encryption mechanism, and the knot insertion vector for effective refinement is calculated by considering the characteristics of temperature gradient distribution around the cooling pipes. In addition, a different calculation parameter has been discussed to show the stability and flexibility of the IGA. The obtained numerical results demonstrate the accuracy and efficiency of the proposed scheme in the simulation of transient temperature fields in concrete structures with cooling systems.

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Section: Introductionmentioning

confidence: 99%

Simulation of thermal field in mass concrete with cooling pipes based on the isogeometric analysis method

Li,

Chen,

Zhu

2024

Front. Phys.

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“…This approach is attractive for transient analysis because it is: (1) stable in obtaining time-domain solutions, (2) simple in implementation and (3) suitable for parallel solution. In addition, one notes that the frequency-domain problems by itself already has a broad range of applications such as harmonic wave propagation in solids [1], air damping on micro resonators [9], heat transfer [10], to name a few.…”

Section: Introductionmentioning

confidence: 99%

Efficiency improvement of the frequency-domain BEM for rapid transient elastodynamic analysis

Xiao

Wen

2013

Comput Mech

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The frequency-domain fast boundary element method (BEM) combined with the exponential window technique leads to an efficient yet simple method for elastodynamic analysis. In this paper, the efficiency of this method is further enhanced by three strategies. Firstly, we propose to use exponential window with large damping parameter to improve the conditioning of the BEM matrices. Secondly, the frequency domain windowing technique is introduced to alleviate the severe Gibbs oscillations in time-domain responses caused by large damping parameters. Thirdly, a solution extrapolation scheme is applied to obtain better initial guesses for solving the sequential linear systems in the frequency domain. Numerical results of three typical examples with the problem size up to 0.7 million unknowns clearly show that the first and third strategies can significantly reduce the computational time. The second strategy can effectively eliminate the Gibbs oscillations and result in accurate time-domain responses.

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“…The authors of the present paper have proposed several numerical formulations to simulate transient heat propagation using a frequency domain approach, particularly in the presence of stratified media with or without embedded inclusions [ [14] - [17]]. Some of these numerical formulations have later been validated using experimental results ( [18], [19]).…”

Section: Introductionmentioning

confidence: 99%

IR thermography used to detect thin defects versus numerical simulation results

Simões¹,

Simões²,

Tadeu³

et al. 2012

Proceedings of the 2012 International Conference on Quantitative InfraRed Thermography

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The work reports the experimental use of Infrared thermography (IRT) to detect embedded defects in mortar specimens. Surface temperature patterns are collected and compared with numerical solutions. The numerical formulations are based on frequency domain approaches using the coupling between the boundary element method and the method of fundamental solutions. Circular cylindrical ring and parallelepiped specimens incorporating thin defects are used. The heat diffusion within the test specimens is induced by line heat sources placed on their axes.

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Experimental validation of a frequency domain BEM model to study 2D and 3D heat transfer by conduction

Cited by 10 publications

References 30 publications

Simulation of thermal field in mass concrete with cooling pipes based on the isogeometric analysis method

Simulation of thermal field in mass concrete with cooling pipes based on the isogeometric analysis method

Efficiency improvement of the frequency-domain BEM for rapid transient elastodynamic analysis

IR thermography used to detect thin defects versus numerical simulation results

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