CFD study of flow accelerated corrosion in 3D elbows

Rani, H. P.; Divya, T.; Sahaya, R.R.; Kain, Vivekanand; Barua, Dilip K.

doi:10.1016/j.anucene.2014.01.031

Cited by 33 publications

(14 citation statements)

References 13 publications

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“…3 presents the results of MTC distribution for the first elbow and the second elbow (i.e., upward direction). From the previous studies [4][5][6] , the results of Chilton and Colburn analogy are in good agreement with the measured wall thickness. FAC susceptible locations in the corresponding components can be found from the MTC distribution results.…”

Section: Resultssupporting

confidence: 74%

“…(2) is given in terms of wall shear stress (τ), mean velocity (U), density (ρ) and Schmidt number (Sc). The values of K were calculated based on the simulation results of wall shear stress 4) . (2) Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Other researches on FAC state that MTC was used to figure out the most FAC susceptible locations. Also, plant and laboratory (experimental) tests were conducted to find out the co-relation between the local mass transfer conditions and FAC wear rate [2][3][4] . According to Chilton and Colburn J-factor analogy, heat, momentum and mass transfer are analogous.…”

Section: Introductionmentioning

confidence: 99%

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A Numerical Study on Flow-Accelerated Corrosion in Two Adjacent Elbows

Yun¹,

Hwang²,

Moon³

2016

Corrosion Science and Technology

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Flow-Accelerated Corrosion (FAC) is a well-known degradation mechanism that attacks the secondary piping in nuclear power plants. Since the Surry Unit 2 event in 1986, most nuclear power plants have implemented management programs to deal with damages in carbon and low-alloy steel piping. Despite the utmost efforts, damage induced by FAC still occurs in power plants around the world. In order to predict FAC wear, some computer programs were developed such as CHECWORKS, CICERO, and COMSY. Various data need to be input to these programs; the chemical composition of secondary piping, flow operating conditions and piping geometries. CHECWORKS, developed by the Electric Power Research Institute (EPRI), uses a geometry code to calculate geometry effects. Such a relatively simple geometry code is limited in acquiring the accuracy of FAC prediction. Recently, EPRI revisited the geometry code with the intention of updating it. In this study, numerical simulations were performed for two adjacent 90° elbows and the results were analysed in terms of the proximity effect between the two adjacent elbows.

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Numerical Study on Flow-Accelerated Corrosion in Two Adjacent Elbows

Yun¹,

Hwang²,

Moon³

2016

Corrosion Science and Technology

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“…CFD has been used as a useful tool for hydrodynamic prediction, design, scale‐up, and optimization of several chemical engineering equipments. Some of the commonly used chemical engineering equipments, that have investigated using CFD so as to understand the underlying flow physics involved are: pipes and pipe bends, particulate flows, packed bed reactors, fluidized bed reactors, bubbly flows, and heat exchangers . CFD has gained a lot of importance in the previous three decades owing to the wide application and promising results, which it offers at a nominal cost.…”

Section: Introductionmentioning

confidence: 99%

Teaching turbulent flow through pipe fittings using computational fluid dynamics approach

Gajbhiye

Kulkarni

Tiwari

et al. 2020

Engineering Reports

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The largest network of fluid transportation in the world is through pipelines.During the transportation of fluids through pipes, several "fittings" are used in the piping system such as elbows, T-junctions, reducers, expanders, bends, couplings, valves, etc. The flow complexities in pipe fittings are accounted for the pressure drop in piping network design. The pressure drop is estimated using the loss coefficient or equivalent length method using standard charts. Computational fluid dynamics (CFD) is a reliable tool to estimate pressure drop and understand nonidealities in pipe fittings. The use of CFD in the advanced level course in transport phenomena/fluid flow for piping network design can help students to implement modern mathematical tools as well as evaluate standard protocols followed in the industries. In this article, an interactive teaching methodology has been implemented to investigate the hydrodynamics in various pipe fittings (elbow, bend, Tee, and reducer) by actually visualizing the flow. The three-dimensional flow visualization is used to demonstrate the nonidealities such as separation, swirling, dead zones, etc. The CFD simulations of pipe fittings provided a new learning experience to the students that would help them to predict the pressure drops in industrial piping network systems. The outcome from the students' survey showed that the proposed CFD methodology assisted them to gain a better understanding of conventional Chemical Engineering subjects of "Transport Phenomena" and "Fluid Dynamics" in an innovative way. K E Y W O R D Scomputational fluid dynamics, head loss coefficient, pipe fittings, turbulence models 1

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“…Rani et al estimated regions favorable to occurrence of flow accelerated corrosion (FAC) in a piping with two elbows for water stream. These CFD simulations include convective coefficients of mass transfer coefficients between fluid and metal surface.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics investigation for austenitic AISI 904L stainless steel corrosion in a biodiesel stream piping

Ferreira

Torres

Lins

et al. 2017

Materials & Corrosion

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A Brazilian biodiesel plant uses the transesterification of soybean oils with the methanol and sodium methoxide catalyst excess to convert these oils into alkyl esters and glycerin. Hydrochloric acid solution is injected in the piping to neutralize free NaOH and reduce saponification of oils. After the hydrochloric acid solution, several failures of pipelines of AISI 316L and 904L steels were registered. The objective of this work is to study the austenitic stainless steel corrosion observed in the downstream piping the hydrochloric acid injection, applying computational fluid dynamics and to evaluate pH and chloride profiles using different geometries for the acid solution injection in order to avoid or mitigate the corrosive attack. The obtained results showed a good agreement with in situ observations of the pipe degradation. All the studied geometries presented evidence of a weak mixture between the polar and non‐polar species, even under turbulent flow. The elbow geometry is more effective to reduce the local corrosive attack compared to two other simulated geometries.

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CFD study of flow accelerated corrosion in 3D elbows

Cited by 33 publications

References 13 publications

A Numerical Study on Flow-Accelerated Corrosion in Two Adjacent Elbows

A Numerical Study on Flow-Accelerated Corrosion in Two Adjacent Elbows

Teaching turbulent flow through pipe fittings using computational fluid dynamics approach

Computational fluid dynamics investigation for austenitic AISI 904L stainless steel corrosion in a biodiesel stream piping

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