Thermal transient finite element computation of a mixing Tee by utilizing CFD results

Qais Saifi; Otso Cronvall

doi:10.23998/rm.76158

Thermal transient finite element computation of a mixing Tee by utilizing CFD results

Qais Saifi^*
, Otso Cronvall

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

Thermal distribution and fluctuation in any piping component due to turbulent mixing of flows with different temperatures vary greatly. Usually, computational fluid dynamics (CFD) tools are used for estimation of flows in piping components. Fatigue that results from fluctuating thermal mass flow across the components can be computed by coupling the CFD results with structural mechanics based finite element (FE) results. However, this procedure is laborious and computationally very expensive. A fluid temperature function has been developed in this paper as a function of internal wall coordinates and time by interpolating experimental or CFD results. Bicubic interpolation function has been used for accurate interpolation. Finally, a thermal transient FE analysis for an actual Tee from a nuclear power plant (NPP) was performed by using the developed fluid temperature function and interpolated CFD results.

Original language	English
Pages (from-to)	1-11
Number of pages	11
Journal	Rakenteiden Mekaniikka
Volume	53
Issue number	1
DOIs	https://doi.org/10.23998/rm.76158
Publication status	Published - 1 Jan 2020
MoE publication type	A1 Journal article-refereed

Keywords

finite elements
thermal cycling
Finite elements
Thermal cycling

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title = "Thermal transient finite element computation of a mixing Tee by utilizing CFD results",

abstract = "Thermal distribution and fluctuation in any piping component due to turbulent mixing of flows with different temperatures vary greatly. Usually, computational fluid dynamics (CFD) tools are used for estimation of flows in piping components. Fatigue that results from fluctuating thermal mass flow across the components can be computed by coupling the CFD results with structural mechanics based finite element (FE) results. However, this procedure is laborious and computationally very expensive. A fluid temperature function has been developed in this paper as a function of internal wall coordinates and time by interpolating experimental or CFD results. Bicubic interpolation function has been used for accurate interpolation. Finally, a thermal transient FE analysis for an actual Tee from a nuclear power plant (NPP) was performed by using the developed fluid temperature function and interpolated CFD results.",

keywords = "finite elements, thermal cycling, Finite elements, Thermal cycling",

author = "Qais Saifi and Otso Cronvall",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors Open access under license.",

year = "2020",

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doi = "10.23998/rm.76158",

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T1 - Thermal transient finite element computation of a mixing Tee by utilizing CFD results

AU - Saifi, Qais

AU - Cronvall, Otso

PY - 2020/1/1

Y1 - 2020/1/1

N2 - Thermal distribution and fluctuation in any piping component due to turbulent mixing of flows with different temperatures vary greatly. Usually, computational fluid dynamics (CFD) tools are used for estimation of flows in piping components. Fatigue that results from fluctuating thermal mass flow across the components can be computed by coupling the CFD results with structural mechanics based finite element (FE) results. However, this procedure is laborious and computationally very expensive. A fluid temperature function has been developed in this paper as a function of internal wall coordinates and time by interpolating experimental or CFD results. Bicubic interpolation function has been used for accurate interpolation. Finally, a thermal transient FE analysis for an actual Tee from a nuclear power plant (NPP) was performed by using the developed fluid temperature function and interpolated CFD results.

AB - Thermal distribution and fluctuation in any piping component due to turbulent mixing of flows with different temperatures vary greatly. Usually, computational fluid dynamics (CFD) tools are used for estimation of flows in piping components. Fatigue that results from fluctuating thermal mass flow across the components can be computed by coupling the CFD results with structural mechanics based finite element (FE) results. However, this procedure is laborious and computationally very expensive. A fluid temperature function has been developed in this paper as a function of internal wall coordinates and time by interpolating experimental or CFD results. Bicubic interpolation function has been used for accurate interpolation. Finally, a thermal transient FE analysis for an actual Tee from a nuclear power plant (NPP) was performed by using the developed fluid temperature function and interpolated CFD results.

KW - finite elements

KW - thermal cycling

KW - Finite elements

KW - Thermal cycling

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DO - 10.23998/rm.76158

M3 - Article

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JO - Rakenteiden Mekaniikka

JF - Rakenteiden Mekaniikka

IS - 1

ER -

Thermal transient finite element computation of a mixing Tee by utilizing CFD results

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Keywords

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