About
A thought leader, collaborator and an engineering specialist, with a demonstrated history…
Articles by Dr Hema
Activity
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Reflecting on some eventful days in Australia, including a site visit to Golden Plains, and meeting colleagues and our partners. In November…
Reflecting on some eventful days in Australia, including a site visit to Golden Plains, and meeting colleagues and our partners. In November…
Liked by Dr Hema Wadhwa
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We’re thrilled to announce that Brett Phillips will be returning as the SUT Chair for 2025! His leadership, vision, and dedication have been…
We’re thrilled to announce that Brett Phillips will be returning as the SUT Chair for 2025! His leadership, vision, and dedication have been…
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As a leader, you must fully embrace the responsibility of cultivating an environment that actively promotes personal and professional growth among…
As a leader, you must fully embrace the responsibility of cultivating an environment that actively promotes personal and professional growth among…
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Experience
Education
Licenses & Certifications
Volunteer Experience
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Gobal WiDS Ambassador
Women in Data Science (WiDS) Worldwide
- Present 1 year 2 months
Science and Technology
Women in Data Science (WiDS) Worldwide is on a mission to increase participation of women in data science to benefit societies worldwide. Increased participation of women in education, innovation and leadership will lead to equal representation in decision making, economic prosperity, and opportunities. Our programs are oriented towards providing inspiration, support, community, education, and career opportunities to our members.
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Treasurer
Society for Underwater Technology (SUT) Perth Branch
- 2 years 3 months
Science and Technology
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Committee Member
Society for Underwater Technology (SUT) Perth Branch
- 4 years 3 months
Science and Technology
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Industry Mentor
Industry Mentoring Network in STEM
- Present 7 years 7 months
Science and Technology
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AOG Subsea Forum Tech Committee Lead
Society for Underwater Technology (SUT) Perth Branch
- 4 years 5 months
Science and Technology
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President P&C
Anzac Park Public School
- Present 1 year 11 months
Education
Publications
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A Flexible Riser Digital Twin for Real-Time Structural Integrity Management
Proceedings of the 26th Offshore Symposium, April 2021, Houston, Texas Texas Section of the Society of Naval Architects and Marine Engineers
A real-time understanding of the structural integrity of flexible risers is critical to avoiding
failures as well as unnecessary and costly replacements. Accurate and efficient computation of
tensile armor wire stress time-histories is the key to enabling the implementation of a flexible
riser digital twin. Accuracy requires capturing the nonlinear kinematics of the flexible’s helically
contra-wound tensile armor layers and their interaction with the other metallic and…A real-time understanding of the structural integrity of flexible risers is critical to avoiding
failures as well as unnecessary and costly replacements. Accurate and efficient computation of
tensile armor wire stress time-histories is the key to enabling the implementation of a flexible
riser digital twin. Accuracy requires capturing the nonlinear kinematics of the flexible’s helically
contra-wound tensile armor layers and their interaction with the other metallic and thermoplastic layers in a dynamic simulation. While it is generally accepted that high-fidelity 3D finite
element models best capture the complex kinematics required to produce accurate stresses, the
main issue is that simulation time remains prohibitive, for example, a single bending cycle on
modern day multi-core computers typically requires 24-48 hours. Therefore, any successful
implementation of a flexible riser digital twin requires an accelerated solver capable of realtime computation of 1000s of bending cycle inputs into the high-fidelity finite element model.
This paper demonstrates a flexible riser digital twin applications centered around the
accelerated solver FLEXAS.Other authors -
Collapse Simulations of an Accidentally Dropped Drill Riser
Proceedings of 28th International Ocean and Polar Engineering Conference
An accidentally dropped drill riser/blowout preventer (BOP) system can pose extreme and costly hazard to subsea facilities. High-fidelity multi-body nonlinear dynamic simulations are required to accurately predict the propagating axial compression waves along the riser due to BOP’s seabed impact, the evolution of the collapse of the riser, riser impact energies, the riser seabed layout, and the resulting impact zone to better manage risks.
The nonlinear simulations must involve detailed…An accidentally dropped drill riser/blowout preventer (BOP) system can pose extreme and costly hazard to subsea facilities. High-fidelity multi-body nonlinear dynamic simulations are required to accurately predict the propagating axial compression waves along the riser due to BOP’s seabed impact, the evolution of the collapse of the riser, riser impact energies, the riser seabed layout, and the resulting impact zone to better manage risks.
The nonlinear simulations must involve detailed finite element models (FEMs) to accurately capture the stiffness and mass distribution along the riser span, the asymmetrical bending stiffness/mass contribution and axial slip from the auxiliary lines, nonlinear behavior at the flex joint, and the flange/flange joint connections. These effects are critically important in the modeling the propagation of the compression waves that speed through the riser from the point of BOP impact and initiate the drill riser buckling and post-buckling dynamics/collapse.
To incorporate detailed FEM and at the same time maintain computational efficiency and accuracy, nonlinear dynamic substructuring (NDS) is utilized. NDS extends the frame work of dynamic substructuring to nonlinear problems enabling highly efficient multibody nonlinear system level simulations while maintaining the accuracy of individual FEM components. The multi-body NDS solver utilized for efficient computation of this large-order multi-physics problem enables the coupling of four physical models: (i) nonlinear dynamics, (ii) hydrodynamics, (iii) flexible body dynamics, and (iv) multi-body dynamics.
The simulations demonstrate that for this drill riser configuration, the top unbuoyed sections play a key role in the collapse process of the drill riser. The seabed impact zone and impact energies to assess potential impact with seabed infrastructure are discussed.Other authors -
Effect of porosity on the hydrodynamic behaviour of oscillating structures during lifting operations
Proceedings of 3rd Marine Heavy Transport and Lift Conference
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Variation of heave added mass and damping near seabed
Proceedings of 29th International Conference on Ocean and Arctic Engineering
Other authors -
Hydrodynamic forces on an oscillating disk under a free surface
Proceedings of 9th Engineering Mathematics and Applications Conference
Other authors -
Experimental assessments of hydrodynamic coefficients of disks oscillating near a free surface
Proceedings of 28th International Conference on Ocean and Arctic Engineering
Other authors -
Evaluation of added mass coefficients using Landweber’s method of conformal mapping
XXII International Congress of Theoretical and Applied Mechanics
Other authors -
Experimental Visualization of flow induced by solid and porous oscillating disks
8th International symposium on Particle Image Velocimetry
Other authors -
Comparison of added mass coefficients for a floating tanker evaluated by conformal mapping and boundary element methods
Australasian Fluid Mechanics conference 2007
Other authors
Courses
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Leading for Results
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Projects
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FPSO Mooring Analysis (Detailed Design)
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Honors & Awards
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Superstar of STEM
Science & Technology Australia
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Corporate Legend Finalist 2024
Australian Professionals of Colour
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WA Women Hall of Fame STEM Inductee 2023
WA Womem Hall of Fame
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WiTWA Tech [+] 20 Award
Women in Technology Western Australia
https://www.linkedin.com/feed/update/urn:li:activity:6865876498440695808/
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Chief Executive Women STEM Scholarship
Chief Executive Women (CEW)
https://www.linkedin.com/feed/update/urn:li:activity:6845886187392110592/
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Best Technical Paper Award
Society of Naval Architects and Marine Engineers, Texas
Technical Publication on Digital Twins of Flexible Risers (Co-authored)
https://www.linkedin.com/feed/update/urn:li:activity:6798825536882905088/ -
Women in Leadership NAARI AWARD
Indian Society of Western Australia
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Top 25 professional migrant in Australia
APA Magazine
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Above and Beyond Award
Nick Brown, Operations Director (ANZ) INTECSEA WorleyParsons Group
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Student Travel Award
The University of Western Australia
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Ad Hoc Postgraduate Scholarship
The University of Western Australia
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UWA Completion Scholarship
The University of Western Australia
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Scholarship for International Research Fees
The University of Western Australia
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University International Stipend
The University of Western Australia
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2010 University International Stripend-Top Up Scholarship
The University of Western Australia
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Ad Hoc Top Up Scholarship
The University of Western Australia
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Ad Hoc Postgraduate Scholarship
The University of Western Australia
Organizations
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Society for Underwater Technology
Elected Committee member 2018
- Present
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From all of us at #TeamAVEVA, we want to wish all of you a very happy and peaceful Christmas and New Year.
From all of us at #TeamAVEVA, we want to wish all of you a very happy and peaceful Christmas and New Year.
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