Hydro-Mechanical Modeling of a Shaft Seal in a ... - COMSOL.com

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Challenges Challenge 1 • Sealing components are initially unsaturated, • Clay-based sealing components have large volume change coupling of the unsaturated flow with structural mechanics Challenge 2 • Properties and conditions at the seal location change abruptly between Stages 1 and 2. Challenge 3 • The durations of Stages 1 and 2 considered in this study are anticipated to be in order of 100 years to 1,000, 000 years. reasonable solution time UNRESTRICTED / ILLIMITÉ 8
Coupling of HM Formulation for Unsaturated Soil Detailed formulations are provided in (Priyanto 2010) H p C SeS KH p D Qs S t S = f g ( p + f ) k e sat w k 0 3 1 1 1 H 1 m C 1 m 0 s p 2 n 1 m K 2 0 3 0 for for 1 S UNRESTRICTED / ILLIMITÉ r S e 1 m k sat k w r H e H 1 m p p 0 0 m for for H H p p 0 0 100 mm •Unsaturated flow = Richard’s equation with vanGenuchten’s SWCC and permeability models. •Mechanical = Linear elastic model •Compare with laboratory triaxial test of CL the Bentonite-Sand CL Impermeable Mixture (BSM) CL 50 mm y Triaxial Specimen (a) 50 mm x Symmetry Symmetry line CL y Impermeable Symmetry u w = 0.2 MPa x Symmetry No flow at symmetry Impermeable line Initial u w = 0.2 MPa u a = 0.101 MPa w c = 18.75% (b) Hydraulic Impermeable Initial u a = 0.101 MPa w c = 18.75% CL y Initial p = 0.5 MPa Symmetry No y-displacement at symmetry line Initial p = 0.5 MPa Symmetry x (c) Mechanical 9
Page 1 and 2: Presented at the COMSOL Conference
Page 3 and 4: Shaft Sealing Concept Shaft Sealing
Page 5 and 6: Objective The objective of this pre
Page 7: Stages of Numerical Modeling 1. Sta
Page 11 and 12: H-M Modeling of Shaft Seal CL 100 m
Page 13 and 14: Porewater Pressure, Stage 2 (0-100
Page 15 and 16: Porewater Pressure, Stage 2 Stage 2
Page 17 and 18: Conclusions • This study has deve
Page 19: Thank you ! Acknowledgements Hydro-

Hydro-Mechanical Modeling of a Shaft Seal in a ... - COMSOL.com

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