ICWES15 - The Study of two Phase Flow Wall Erosion using a Generalized Computational Fluid dynamics Prediction Model. Presented by Ms Dorina Ionescu, Johannesburg, SAfrica

THE STUDY OF TWO PHASE FLOW WALL EROSION USING A GENERALIZED COMPUTATIONAL FLUID DYNAMIC MODEL Dorina Ionescu Department of Mechanical Engineering Technology Faulty of Engineering; South Africa

WALL EROSION THEORY ,[object Object],[object Object],[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists

GENERALIZED EROSION PREDICTION MODELS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists

RELATION BETWEEN EROSION, PRESSURE DROP AND BEND GEOMETRY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists

EROSION PREDICTION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists

EROSION PREDICTION ,[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists

Location of maximum pipe erosion in bends with a R/D ratio of 2,5 ,[object Object],[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists Maximum erosion of 4,36e- 07 kg/m 2 -s situated at 42 0 from the material entrance Maximum erosion of 2,69e - 07 kg/m 2 -s situated at 42 0 from the material entrance

Location of maximum pipe erosion in bends with a R/D ratio of 5 ,[object Object],[object Object],15th International Conference for Women Engineers and Scientists Maximum erosion of 3,61e – 07 kg/m 2 - s situated at 35 0 and 75 0 from the material entrance in the bend

Location of maximum pipe erosion in bends with a R/D ratio of 5 ,[object Object],[object Object],15th International Conference for Women Engineers and Scientists Maximum erosion of 2,21e – 07 kg/m 2 -s situated at 40 0 and 85 0 from the material entrance in the bend

EROSION REDUCTION - UNIVERSITY OF JOHANNESBURG RESEARCH ,[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists 12,8 % (R/D=2,5) 6,0 % (R/D=5) 11,4 % (R/D=2,5) 5,3 % (R/D=5) Volume 1 - S = 28,6 m/s; Volume 2 - S = 28,3 m/s; Volume 3 - S = 28,8 m/s; Volume 4 – S = 28,5 m/s; Volume 1 = 32, 8 m/s; Volume 2 = 30, 1 m/s; Volume 3 = 32, 5 m/s; Volume 4 = 30, 1 m/s; Velocity decrease in modified volumes as compared to the reference volumes Modified volumes Control volumes

EROSION REDUCTION - UNIVERSITY OF JOHANNESBURG RESEARCH ,[object Object],[object Object],[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists

Wall erosion reduction in the Modified volumes due to velocity decrease ,[object Object],[object Object],15th International Conference for Women Engineers and Scientists Volume 1-S: Average erosion 1, 49 e - 07 kg/m 2 - s Volume 1-S: Maximum erosion 2, 71e - 07 kg/m 2 - s

EROSION REDUCTION - UNIVERSITY OF JOHANNESBURG RESEARCH ,[object Object],[object Object],15th International Conference for Women Engineers and Scientists Volume 3-S: Maximum erosion 2, 71e - 07 kg/m 2 -s Volume 3-S: Average erosion 1, 22e - 07 kg/m 2 - s

Wall erosion reduction in the Modified volumes due to velocity decrease ,[object Object],[object Object],15th International Conference for Women Engineers and Scientists Volume 2-S: Average erosion 9, 06e - 08 kg/m 2 - s Volume 2-S: Maximum erosion 2, 59e - 07 kg/m 2 - s

Wall erosion reduction in the Modified volumes due to velocity decrease ,[object Object],[object Object],15th International Conference for Women Engineers and Scientists Volume 4-S: Maximum erosion 2, 93e - 07 kg/m 2 - s Volume 4-S: Average erosion 9, 06e - 08 kg/m 2 - s

Calculation of mass loss through erosion and the installation life expectancy ,[object Object],[object Object],[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists

Calculation of mass loss through erosion and the installation life expectancy ,[object Object],[object Object],15th International Conference for Women Engineers and Scientists 59,3 days 49 days 36,3 days 30 days Installation life expectancy 2,21 x 10 -7 [kg/m 2 – s] 2,69 x 10 -7 [kg/m 2 – s] 3,61 x 10 -7 [kg/m 2 – s] 4,36 x 10 -7 [kg/m 2 – s] Maximum mass loss through erosion 30,1 m /s 32,5 m /s 30,1 m /s 32,8 m /s Maximum velocity 17,765kPa 17,56 kPa 17,34 kPa 17,08 kPa Overall static pressure Volume 4 Volume 3 Volume 2 Volume 1

Calculation of mass loss through erosion and the installation life expectancy ,[object Object],[object Object],15th International Conference for Women Engineers and Scientists 112 days 107,4 days 144, 7 days 88 days Installation life expectancy 189 % 219 % 399 % 293 % Installation life expectancy increase compared to control volumes 1, 17 x 10 -7 [kg/m 2 – s] 1, 22 x 10 -7 [kg/m 2 – s] 0, 906 x 10 -7 [kg/m 2 – s] 1, 49 x 10 -7 [kg/m 2 – s] Maximum mass loss through erosion 28, 5 m/s 28, 8 m/s 28, 3 m/s 28, 6 m/s Maximum velocity 28,6 kPa 29,1 kPa 28,4 kPa 22,5 kPa Overall static pressure Volume 4-S Volume 3-S Volume 2-S Volume 1-S

CONCLUSIONS ,[object Object],[object Object],[object Object],[object Object],[object Object],15th International Conference for Women Engineers and Scientists

ICWES15 - The Study of two Phase Flow Wall Erosion using a Generalized Computational Fluid dynamics Prediction Model. Presented by Ms Dorina Ionescu, Johannesburg, SAfrica

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ICWES15 - The Study of two Phase Flow Wall Erosion using a Generalized Computational Fluid dynamics Prediction Model. Presented by Ms Dorina Ionescu, Johannesburg, SAfrica