Maiesha Nujhat’s Post

Recent publication: "Dynamic amplification of rail tracks in high-speed lines: exploring train effects and impact of ground treatment", Transportation Geotechnics

In this video, you will learn: • Hydro-elastic analysis of Very Large Floating Structures (VLFS) through modal expansion method • How to perform hydrodynamic and motion analysis of deformable bodies • Structural dynamics solver of MOSES; Generalized Degrees of Freedom (GDOF) • How to include hull deflection when calculating hydrodynamic forces • VLFS project MOSES was applied for (frequency domain analysis) #moses #offshorewind #windenergy #structuralengineering #turbine https://lnkd.in/gT65yj2G

New publication alert!🚨 We used the Lagrangian particle tracking module in EFDC+ Explorer Modeling System to analyze GPS-tagged drifter data from NOAA and conducted sensitivity analysis and calibration to improve tracking accuracy.  Our results showed that adjusting wind drag significantly affected the model’s performance, with the Skill Score jumping from 0.23 to 0.47, however changing the model from 2D to 3D didn’t have a large enough influence on the results. Check out the complete work if you are interested about our approach and findings!  #HydrodynamicModeling #SensitivityAnalysis #Calibration #EnvironmentalResearch #EFDC+ #particle_tracking  https://lnkd.in/gPYvhjy8

ALERT: Geomagnetic K-index of 8, 9- Threshold Reached: 2024 May 10 1739 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G4 - Severe

Ground Motion Prediction Equations (#GMPEs), also known as #attenuation relationships, are crucial tools in the field of #earthquake engineering and #seismology. They are used to estimate the expected ground motions at a specific site given the characteristics of an earthquake. The use of GMPEs spans several critical applications, which are fundamental in both understanding #seismic #hazards and mitigating their impacts.

#JustPublished "Performance and limits of a geotechnical centrifuge: DEM‑LBM simulations of saturated granular column collapse" in Granular Matter 26(32) 2024 Paper by William Webb and Dr Barbara Turnbull at University of Nottingham, with Dr Alessandro Leonardi at The University of Sheffield - This study examines the influence of centrifugal and Coriolis accelerations on the dynamics of experimental particle-laden flows inside a geotechnical centrifuge. - The Discrete Element Method (DEM) and the Lattice-Boltzmann Method (LBM) are coupled to simulate the collapse behaviour of a just-saturated granular column within a rotating reference frame, initially validating the model with data from physical experiments. - The analysis uncovers how centrifugal and Coriolis accelerations impact flow structure and mobility, offering actionable insights to mitigate their effects on flow dynamics. - By introducing an interstitial pore fluid and considering multiple variables that influence flow behaviour across a wide parameter space, this work enhances the understanding of granular flow dynamics in geotechnical centrifuge models. Paper available: https://lnkd.in/ePpp4Xte #DEM #LBM #GranularCollapse #JustSaturated #CentrifugeModelling

This FLOW-3D HYDRO model illustrates the benefits of natural vegetation, such as mangroves, as a coastal defense mechanism. In the top model, the incoming waves run up on an unprotected beach slope, and the total volume of fluid that overtops the beach is quantified. In the other run, a 3D object representing mangroves is added at the base of the beach slope. The mangroves help to dissipate the wave's energy and reduce the overtopping volume. Learn more about FLOW-3D HYDRO at https://lnkd.in/dacm4XT3. #cfd #computationalfluiddynamics #flow3d #flow3dhydro #simulation #simulationsoftware #simulations #engineering #technology #fluiddynamics #fluidflow #turbulence

📢 New Publication Alert! We are excited to share that our research has been published in Hydrology and Earth System Sciences (HESS)! When #Theory meets #CFD The current research aims to investigate the applicability of entropy theory to estimate the velocity distribution and discharge in the vicinity of river bridges. For this purpose, a computational fluid dynamics (CFD) model is used to obtain three-dimensional flow fields along a stretch of the Paglia River (central Italy), where a historical multi-arch bridge strongly affects flood flows. The input data for the entropy model include the cross-sectional bathymetry and the surface velocity provided by the numerical simulations. Both models could capture the bridge-pier effect on the cross-sectional velocity distribution. Our team: Tommaso Lazzarin Silvia Barbetta Tommaso Moramarco and Daniel Viero #FluidMechanics #EnvironmentalScience #WaterResources #Hydraulic #Rivers #Research #CFD #EntropyTheory #CNR

COMPDYN 2025! I am very happy to announce that I will be co-organizing a minisymposium at the COMPDYN Conference 2025 with Roberto Tartaglia and Aldo Milone. Minisymposium 67: "Global and local behaviour of steel structures under seismic, fatigue and robustness actions" The proposed MS is devoted to collect new contributions on the behavior, design, testing and analysis of steel and steel-composite structures give particular attention to the joint performance. The main topic addressed by this MS will cover analytical, experimental, and numerical analyses of both traditional and innovative types of structures and joints under different conditions, such as seismic loading, fatigue, and robustness actions. Deadline for Abstract Submission: 15 November 2024 Deadline for submitting the Full Paper (optional): 14 March 2025 More information at the minisymposium page.   https://lnkd.in/dCGnQugn

In-situ measurements of the current and wave climate in coastal environments is critical to operational planning and safety. Numerical models often require validation from oceanographic measurements to determine optimal locations of seawalls and other protective structures. This is one of several ways that ADCPs might fit into a #CoastalEngineering project. Calling all of our coastal engineer friends... how have ADCPs helped you? https://bit.ly/3T9J5wk