Boundary layer effects in turbulent flow testing

Turgoose, S; Dawson, J L; Palmer, J W; Rizk, T

Title: Boundary layer effects in turbulent flow testing

Full Record
Other Related Research

Abstract

Flow accelerated corrosion under turbulent flow is a complex process with enhanced mass transport, development of concentration gradients and film formation all influencing the corrosion rate. Published data from well established hydrodynamic correlations of mass transfer and flow, and shear stress and flow, are first compared to illustrate the relative magnitudes of the various parameters for different flow geometries. The results of these empirical studies are also compared with the universal velocity profile concept. The analysis shows that any lack of correspondence between corrosion data obtained with different, well characterize, flow apparatus, such as pipe loop, rotating cylinder electrode (RCE) or jet impingement rig, cannot be ascribed to any fundamental difference in correlations between mass transfer and shear stress. The corrosion system of carbon steel in CO{sub 2} containing brine is then used to demonstrate that the developing concentration profiles are a major factor in flow enhanced corrosion under turbulent conditions. Leading edge effects on electrodes have a significant influence not anticipated from fully developed flow data. The study indicates that the RCE provides baseline corrosion data comparable with that from an infinitely long pipeline. Test loop electrodes are usually of short length and experience conditions comparable to jet impingement.more »« less

Authors:

Turgoose, S ^[1]; Dawson, J L; Palmer, J W; Rizk, T ^[2]

UMIST, Manchester (United Kingdom). Corrosion and Protection Centre
CAPCIS Ltd., Manchester (United Kingdom)

Publication Date:: Sun Oct 01 00:00:00 EDT 1995

OSTI Identifier:: 106115

Report Number(s):: CONF-950304-
TRN: IM9542%%203

Resource Type:: Conference

Resource Relation:: Conference: Corrosion `95: National Association of Corrosion Engineers (NACE) international annual conference and corrosion show, Orlando, FL (United States), 26-31 Mar 1995; Other Information: PBD: 1995; Related Information: Is Part Of Corrosion/95 conference papers; PB: 5788 p.

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 02 PETROLEUM; CARBON STEELS; CORROSION; CARBON DIOXIDE; CORROSIVE EFFECTS; FIELD PRODUCTION EQUIPMENT; TURBULENT FLOW; MASS TRANSFER; SHEAR PROPERTIES

Citation Formats


                    Turgoose, S, Dawson, J L, Palmer, J W, and Rizk, T. Boundary layer effects in turbulent flow testing.  United States: N. p., 1995. 
        Web.

Copy to clipboard


                    Turgoose, S, Dawson, J L, Palmer, J W, & Rizk, T. Boundary layer effects in turbulent flow testing.  United States.

Copy to clipboard


                    Turgoose, S, Dawson, J L, Palmer, J W, and Rizk, T. 1995.  
        "Boundary layer effects in turbulent flow testing".  United States.

Copy to clipboard


                    
@article{osti_106115,

  title        = {Boundary layer effects in turbulent flow testing},

  author       = {Turgoose, S and Dawson, J L and Palmer, J W and Rizk, T},

  abstractNote = {Flow accelerated corrosion under turbulent flow is a complex process with enhanced mass transport, development of concentration gradients and film formation all influencing the corrosion rate. Published data from well established hydrodynamic correlations of mass transfer and flow, and shear stress and flow, are first compared to illustrate the relative magnitudes of the various parameters for different flow geometries. The results of these empirical studies are also compared with the universal velocity profile concept. The analysis shows that any lack of correspondence between corrosion data obtained with different, well characterize, flow apparatus, such as pipe loop, rotating cylinder electrode (RCE) or jet impingement rig, cannot be ascribed to any fundamental difference in correlations between mass transfer and shear stress. The corrosion system of carbon steel in CO{sub 2} containing brine is then used to demonstrate that the developing concentration profiles are a major factor in flow enhanced corrosion under turbulent conditions. Leading edge effects on electrodes have a significant influence not anticipated from fully developed flow data. The study indicates that the RCE provides baseline corrosion data comparable with that from an infinitely long pipeline. Test loop electrodes are usually of short length and experience conditions comparable to jet impingement. It is shown that local rates of mass transfer are significantly greater on short electrodes than on ``long`` electrodes and hence higher corrosion rates are expected. Also, the local ferrous ion concentrations will be lower (at a given corrosion rate) on short electrodes, thereby reducing the tendency to form protective films.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/106115},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sun Oct 01 00:00:00 EDT 1995},

  month        = {Sun Oct 01 00:00:00 EDT 1995}

}

Copy to clipboard

Conference:

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Correlation of steel corrosion in pipe flow with jet impingement and rotating cylinder tests

Journal Article Efird, K; Wright, E; Boros, J; ... - Corrosion

The relationship of laboratory fluid flow corrosion test techniques to flow-accelerated corrosion in field applications and the parameters required to apply laboratory data effectively in the field were studied. Single-phase, aqueous, sweet corrosion of steel in turbulent pipe flow was correlated to corrosion in jet impingement and rotating cylinder tests. All tests were conducted simultaneously, using the same test fluid to minimize environmental variables and to allow a direct, realistic comparison of test methods. Rotating cylinder electrode corrosion rates did not correlate with pipe flow based on wall shear stress or mass transfer for flow-accelerated corrosion of carbon (C) steelmore »« less
https://doi.org/10.5006/1.3316026
Effects of multiphase flow on corrosion inhibitor

Conference Chen, Y; Jepson, W; Chen, H

This paper investigates the inhibition performance of a typical imidazoline based inhibitor under multiphase flow. Electrochemical impedance spectroscopy (EIS) measurements were carried out in a 101.6 mm I.D., 15 m long acrylic flow loop using ASTM substitute saltwater and carbon dioxide gas. This flow loop system can generate slug flow, fill pipe flow and other multiphase flow patterns. Effects of different flow conditions on inhibition performance of this typical inhibitor were examined. The system was maintained at a pressure of 0.136 MPa and a temperature of 40 C. EIS measurements for this inhibitor in a Rotating Cylinder Electrode (RCE) systemmore »« less
Corrosion of carbon steel by CO{sub 2} solutions: The role of fluid flow

Conference Jordan, K; Rhodes, P

Analysis of recently reported observations of corrosion of carbon steel by CO{sub 2} in pipes, impinging jets and rotating cylinders illustrates the importance of distinguishing between momentum and mass transport. Apparent inconsistencies in the data can be explained. Increasing flow rates can cause increases in momentum, heat and mass transfer. In the case of corrosion of carbon steel by CO{sub 2}, increases in the corrosion rate have been observed. This paper addresses the question, ``Which physical effect (wall shear stress or mass transfer) plays a prominent role in raising the corrosion rate?`` Experiments in pipe, impinging jet, and rotating cylindermore »« less
Evaluation of critical flow intensities for FILC in sour gas production

Conference Schmitt, G; Bosch, C; Bruckhoff, W; ...

Using submerged jet impingement experiments critical wall shear stresses for initiation of flow induced localized corrosion (FILC) were evaluated for the system carbon steel/aqueous polysulfide containing monoethylamine (MEA) solutions/H{sub 2}S (22 to 42 bar). Due to an extraordinary MEA concentration effect the critical wall shear stress at 130 C was about 90 N/m{sup 2} in 2.4 M MEA but only 2 N/m{sup 2} in 5 M MEA solution. Inhibition could increase this low value to 17 N/m{sup 2}. Wall shear stresses up to 53 N/m{sup 2} could be reached by precorrosion under subcritical flow conditions and use of an inhibitormore »« less
Hydrodynamic correlations between pipe flow and rotating cylinder electrode (RCE) for oilfield corrosion -- Some insights

Book Dayalan, E; Johar, T; Shadley, J; ...

Small scale, table top devices such as the rotating cylinder electrode (RCE) have received increased attention as a means for making decisions about material and inhibitor selections for oilfield applications. In order to utilize the corrosion data from an RCE to predict the behavior in a pipe geometry, it is necessary to establish correlations between the pipe flow velocity and the RCE rotation speed. Most often, correlations between the two geometries were attempted based on the equality of (1) the mass transfer coefficient or (2) the wall shear stress. The validity of these correlations is critically examined in this studymore »« less

Similar Records