[HTML][HTML] Anisotropic mesh adaptation for region-based segmentation accounting for image spatial information

M Giacomini, S Perotto - Computers & Mathematics with Applications, 2022 - Elsevier
A finite element-based image segmentation strategy enhanced by an anisotropic mesh
adaptation procedure is presented. The methodology relies on a split Bregman algorithm for …

[HTML][HTML] A semi-implicit conservative sharp-interface method for liquid-solid phase transition

JWJ Kaiser, S Adami, IS Akhatov, NA Adams - International Journal of Heat …, 2020 - Elsevier
The solidification of an undercooled liquid is physically unstable. The dominating instability
modes are affected by both the evolving temperature field in the solid and liquid phases, and …

Microstructural and infiltration properties of woven preforms during chemical vapor infiltration

CM Cha, D Liliedahl, R Sankaran… - Journal of the American …, 2022 - Wiley Online Library
Interface‐resolved direct numerical simulations (DNSs) of chemical vapor infiltration (CVI)
have been performed over a range of furnace‐operating conditions (Thiele moduli) and for …

[HTML][HTML] Optimization-based level-set re-initialization: A robust interface preserving approach in multiphase problems

AR Hashemi, MR Hashemi, PB Ryzhakov… - Computer Methods in …, 2024 - Elsevier
In spite of its overall efficiency and robustness for capturing the interface in multiphase fluid
dynamics simulations, the well-known shortcoming of the level-set method is associated with …

A sharp interface model for deterministic simulation of dendrite growth

V Ramanuj, R Sankaran, B Radhakrishnan - Computational Materials …, 2019 - Elsevier
A high order level set model is developed for deterministic simulation of dendritic growth in
unstable solidifying systems. The model captures motion of the front implicitly on a structured …

Chemical vapor infiltration of additively manufactured preforms: Pore‐resolved simulations and experimental validation

V Ramanuj, R Sankaran, B Jolly… - Journal of the …, 2022 - Wiley Online Library
The densification of additively manufactured porous preforms by chemical vapor infiltration
(CVI) is studied using pore‐resolved simulations and experiments. Experimentally, 3D …

A Level Set Model for Structured Mesh Representation of Fibrous Preforms used in Composites Manufacturing

V Ramanuj, R Sankaran, D Liliedahl… - Applied Composite …, 2024 - Springer
A model for implicit representation of fibrous and woven preforms used for composites
manufacturing is described. The method is based on a level set function defined on a …

Effects of temperature inversion on densification in chemical vapor infiltration

V Ramanuj, M Li, W Ge, R Sankaran… - Journal of the …, 2024 - Wiley Online Library
In a classical chemical vapor infiltration (CVI) process, the competing effects of chemical
kinetics and reagent gas transport lead to non‐uniform depositions such that outer layers of …

Accurate image segmentation based on adaptive distance regularization level set method

H Xiao, B Zhang, R Liu, Y Zou, T Xie - International Journal of …, 2022 - World Scientific
Level set method has been widely applied in the field of image segmentation. However, the
level set formulation is inevitably affected by the regularization function, in-homogeneity and …

Macrovoid resolved simulations of transport through HPRO relevant membrane geometries

V Ramanuj, R Sankaran, L Malenica, K Cole… - Journal of Membrane …, 2022 - Elsevier
Modeling the transport properties such as diffusivity and permeability of high pressure
reverse osmosis (HPRO) membranes is critical for the selection and manufacture of …