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A high-order elliptic PDE based level set reinitialisation method using a discontinuous Galerkin discretisation (2018)
Journal Article
Adams, T., Giani, S., & Coombs, W. (2019). A high-order elliptic PDE based level set reinitialisation method using a discontinuous Galerkin discretisation. Journal of Computational Physics, 379, 373-391. https://doi.org/10.1016/j.jcp.2018.12.003

In this paper, an efficient, high-order accurate, level set reinitialisation method is proposed, based on the elliptic reinitialisation method (Basting and Kuzmin, 2013 [1]), which is discretised spatially using the discontinuous Galerkin (DG) symmet... Read More about A high-order elliptic PDE based level set reinitialisation method using a discontinuous Galerkin discretisation.

B-spline based boundary conditions in the material point method (2018)
Journal Article
Bing, Y., Cortis, M., Charlton, T., Coombs, W., & Augarde, C. (2019). B-spline based boundary conditions in the material point method. Computers and Structures, 212, 257-274. https://doi.org/10.1016/j.compstruc.2018.11.003

The material point method is an increasingly popular method for tackling solid mechanics problems involving large deformations. However, there are issues associated with applying boundary conditions in the method and, to date, no general approach for... Read More about B-spline based boundary conditions in the material point method.

A posteriori discontinuous Galerkin error estimator for linear elasticity (2018)
Journal Article
Bird, R., Coombs, W., & Giani, S. (2019). A posteriori discontinuous Galerkin error estimator for linear elasticity. Applied Mathematics and Computation, 344-345, 78-96. https://doi.org/10.1016/j.amc.2018.08.039

This paper presents for the first time the derivation of an hp a posteriori error estimator for the symmetric interior penalty discontinuous Galerkin finite element method for linear elastic analysis. Any combination of Neumann and Dirichlet boundary... Read More about A posteriori discontinuous Galerkin error estimator for linear elasticity.

Centrifuge testing to verify scaling of offshore pipeline ploughs (2018)
Journal Article
Robinson, S., Brown, M., Matsui, H., Brennan, A., Augarde, C., Coombs, W., & Cortis, M. (2019). Centrifuge testing to verify scaling of offshore pipeline ploughs. International Journal of Physical Modelling in Geotechnics, 19(6), 305-317. https://doi.org/10.1680/jphmg.17.00075

Offshore pipeline ploughs have previously been modelled at 1g with small 1:50 scale models designed to derive the parameters required for prediction of ploughing in terms of tow force requirements and potential advance rates. This was scaled up to pr... Read More about Centrifuge testing to verify scaling of offshore pipeline ploughs.

On the Use of Advanced Material Point Methods for Problems Involving Large Rotational Deformation (2018)
Presentation / Conference Contribution
Wang, L., Coombs, W., & Augarde, C. (2018, July). On the Use of Advanced Material Point Methods for Problems Involving Large Rotational Deformation. Paper presented at 13th World Congress on Computational Mechanics / 2nd Pan American Congress on Computational Mechanics (WCCM 2018), New York, USA

The Material Point Method (MPM) is a quasi Eulerian-Lagrangian approach to solve solid mechanics problems involving large deformations. The standard MPM discretises the physical domain using material points which are advected through a standard finit... Read More about On the Use of Advanced Material Point Methods for Problems Involving Large Rotational Deformation.

Centrifuge modelling of screw piles for offshore wind energy foundations (2018)
Presentation / Conference Contribution
Davidson, C., Al-Baghdadi, T., Brown, M., Knappett, J., Brennan, A., Augarde, C., Wang, L., Coombs, W., Richards, D., Blake, A., & Ball, J. (2018, July). Centrifuge modelling of screw piles for offshore wind energy foundations. Presented at 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), London, UK

Screw piles (helical piles) can provide a viable, cost-effective and low-noise installation alternative to increasing the size of existing foundation solutions (e.g. monopiles) to meet the demand for the advancement of offshore wind energy into deepe... Read More about Centrifuge modelling of screw piles for offshore wind energy foundations.

On the use of NURBS plasticity for geomaterials (2018)
Presentation / Conference Contribution
Coombs, W., & Ghaffari Motlagh, Y. (2018, June). On the use of NURBS plasticity for geomaterials. Presented at NUMGE 2018: 9th European Conference on Numerical Methods in Geotechnical Engineering., Porto, Portugal

On the use of the material point method to model problems involving large rotational deformation (2018)
Presentation / Conference Contribution
Wang, L., Coombs, W. M., Augarde, C. E., Brown, M. J., Knappett, J., Brennan, A., Davidson, C., Richards, D., & Blake, A. (2018, June). On the use of the material point method to model problems involving large rotational deformation. Presented at NUMGE 2018: 9th European Conference on Numerical Methods in Geotechnical Engineering, Porto, Portugal

A modified CPT based installation torque prediction for large screw piles in sand (2018)
Presentation / Conference Contribution
Davidson, C., Al-Baghdadi, T., Brown, M., Knappett, J., Brennan, A., Augarde, C., Coombs, W., Wang, L., Richards, D., Blake, A., & Ball, J. (2018, June). A modified CPT based installation torque prediction for large screw piles in sand. Presented at Cone Penetration Testing 2018, Delft, Netherlands

Screw piles have been suggested as an alternative foundation solution to straight-shafted piles for jacket supported offshore wind turbines in deep water. The significant environmental loads in the marine environment will require substantially larger... Read More about A modified CPT based installation torque prediction for large screw piles in sand.