Browsing by Author "Calafell Sandiumenge, Joan"
Now showing items 1-12 of 12
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A data-driven wall-shear stress model for LES using gradient boosted decision trees
(Springer Nature, 2021)
Conference report
Open AccessWith the recent advances in machine learning, data-driven strategies could augment wall modeling in large eddy simulation (LES). In this work, a wall model based on gradient boosted decision trees is presented. The model ... -
A dynamic wall model for large eddy simulation on unstructured meshes. Application to wind turbine dedicated airfoils
(Begell House, 2015)
Conference report
Restricted access - publisher's policyLarge eddy simulations (LES) of wall resolved flows at high Reynolds number are still computation-ally demanding. In the present work, a new Dynamic Wall Model (DWM) for LES is presented. The methodology, implemented on ... -
A stochastic approach to reconstruction of faults in elastic half space
(2019-06-01)
Article
Open AccessWe introduce in this study an algorithm for the imaging of faults and of slip fields on those faults. The physics of this problem are modeled using the equations of linear elasticity. We define a regularized functional to ... -
A time-average filtering technique to improve the efficiency of two-layer wall models for large eddy simulation in complex geometries
(Elsevier, 2019-06-30)
Article
Open AccessTwo-Layer wall models have been recurrently studied since they represent a good physical model for Large Eddy Simulations with underresolved wall regions. Specifically, those based on the Reynolds Averaged Navier-Stokes ... -
An efficient Two-Layer wall model for accurate numerical simulations of aeronautical applications
(2019)
Conference report
Open AccessTwo-Layer wall models have been widely studied since they allow wall modeled Large Eddy Simulationsof general non-equilibrium flows. However, they are plagued by two persistent problems, the "log-layermismatch" and the ... -
An efficient two-layer wall model for high Reynolds number large eddy simulation
(International Centre for Numerical Methods in Engineering (CIMNE), 2018)
Conference report
Restricted access - publisher's policyWall-bounded flows at high Reynolds number are an important research field given that they are present in many important industrial applications. Nonetheless, the use of accurate numerical methodologies such as Large Eddy ... -
Data-driven wall modeling for LES involving non-equilibrium boundary layer effects
(Emerald Publishing Limited, 2024)
Article
Open AccessPurpose Wall-modeled large eddy simulation (LES) is a practical tool for solving wall-bounded flows with less computational cost by avoiding the explicit resolution of the near-wall region. However, its use is limited in ... -
Data-driven wall modeling for LES involving non-equilibrium boundary layer effects
(2024-08-26)
Article
Open AccessPurpose Wall-modeled large eddy simulation (LES) is a practical tool for solving wall-bounded flows with less computational cost by avoiding the explicit resolution of the near-wall region. However, its use is limited in ... -
Efficient wall modeling for large eddy simulations of general non-equilibrium wall-bounded flows
(Universitat Politècnica de Catalunya, 2019-07-05)
Doctoral thesis
Open AccessThe main purpose of this thesis has been to contribute to the development of methodologies for wall modeling Large Eddy Simulations (LES) of wall-bounded flows, especially those at high Reynolds numbers. This flow configuration ... -
Fast urban flow predictions through Convolutional Neural Networks
(2023)
Conference report
Open AccessHaving real-time and accurate numerical predictions of urban wind flow can be extremely useful for developing tools intended to improve citizens’ life quality and health. However, traditional methods such as Computational ... -
Flow over a realistic car model: wall modeled large eddy simulations assessment and unsteady effects
(2018-03-01)
Article
Open AccessNumerical simulations are carried out on the flow over a realistic generic car geometry, the DrivAer-fastback car model. Pure large eddy simulations (LES) and wall-modeled large eddy simulations (WMLES) are used and compared ... -
Numerical Resolution of Turbulent Flows
(Universitat Politècnica de Catalunya, 2011-06-01)
Master thesis
Open AccessThe main goal of the project was to develop a new independent code able to solve turbulent ows numerically. Once the code nished, it has been used to solve three canonic ows of which benchmark solutions are published, ...
