Numerical study of hydrodynamic drag effects of streamwise riblet structures on SUBOFF bare hull model

S Kim, K Chang, SW Lee, M Kim, J Yoon, J Ryu - Ocean Engineering, 2024 - Elsevier
This study performs a full-scale numerical simulation on meter-scale underwater vehicles
(UWVs) with micrometer-scale V-type streamwise riblet structures, focusing on …

Adaptive-fidelity design automation framework to explore bioinspired surface riblets for drag reduction

S Sanjay Lulekar, P Ghassemi, H Alsalih, S Chowdhury - AIAA Journal, 2021 - arc.aiaa.org
Bioinspired surface riblets have been known to improve drag performance by altering the
near-wall flow structures, especially in the transitional flow regime. Unlike conventional riblet …

Adaptive in situ model refinement for surrogate-augmented population-based optimization

P Ghassemi, A Mehmani, S Chowdhury - Structural and Multidisciplinary …, 2020 - Springer
In surrogate-based optimization (SBO), the deception issues associated with the low fidelity
of the surrogate model can be dealt with in situ model refinement that uses infill points …

Adaptive model refinement with batch bayesian sampling for optimization of bio-inspired flow tailoring

P Ghassemi, SS Lulekar, S Chowdhury - AIAA Aviation 2019 Forum, 2019 - arc.aiaa.org
This paper presents an advancement of a model-independent surrogate based optimization
method with adaptive sampling, known as Adaptive Model Refinement. The primary …

Comparative Analysis of Different Profiles of Riblets on an Airfoil using Large Eddy Simulations

A Tyagi, A Ghosh, R Singh - 2023 IEEE Aerospace Conference, 2023 - ieeexplore.ieee.org
Nature has adapted throughout its existence, from humans to fishes, and amongst these
adaptations, several nature-driven optimizations have made species better suited to the …

전산해석을통한유선방향미세구조적용SUBOFF 모델에나타나는항력효과관찰

김승기, 장경식, 이상욱, 김민재, 윤재문… - 대한기계학회논문집B …, 2024 - dbpia.co.kr
수중 운동체는 국방의 목적뿐만 아니라, 해저 탐사 등의 목적으로도 사용되고 있는 다목적
운동체이다. 본 연구에서는 수동적인 항력 감소 효과가 있다고 알려진 V 자형 미세 구조를 …

Decentralized Planning Algorithms and Hybrid Learning for Scalable and Explainable Swarm Robotic Systems

P Ghassemi - 2021 - search.proquest.com
Swarm robotic system is a large number of autonomous systems working together to
accomplish collective goals. Swarm systems offer remarkable operational flexibility …

Evolutionary & Physics Infused Learning for Intelligent Systems

A Behjat - 2021 - search.proquest.com
In many cases, a high fidelity or “full physics” model is either not available or, if available, is
computationally prohibitive to evaluate, especially in time-sensitive usage contexts like …

Passive Surface Flow Tailoring with Optimized Bio-inspired Riblets on 3D-Airfoil

S Lulekar - 2019 - search.proquest.com
Passive surface elements have proven to improve the drag performance of the system by
altering the near-wall flow structures. They are extremely effective in the transitional to …

[引用][C] PASSIVE SURFACE FLOW TAILORING WITH OPTIMIZED

S Lulekar - 2018 - State University of New York at …