A5016029274- Fluid Dynamics and Heat Transfer
- Surface Modification and Superhydrophobicity
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics Simulations and Interactions
- Plant Surface Properties and Treatments
- Fluid Dynamics and Turbulent Flows
- Computational Fluid Dynamics and Aerodynamics
- Nanomaterials and Printing Technologies
- Particle Dynamics in Fluid Flows
- Advanced biosensing and bioanalysis techniques
- Fluid Dynamics and Thin Films
- Advanced Nanomaterials in Catalysis
- Carbon and Quantum Dots Applications
University of California, Los Angeles
2022-2025
University of California System
2024
Understanding the dynamics of non-isothermal droplet spreading is critical for various industrial applications, including turbine blade cooling, biodiagnostics, and aerospace manufacturing. This study investigates behavior molten droplets impacting cold solid substrates, where simultaneous solidification occur due to heat exchange. Traditional analytical numerical methods often fall short in accurately predicting key outcomes such as arrested diameter ([Formula: see text]) contact angle...
The three-dimensionality of turbulence initiates with spanwise vortex deformations associated the amplification three-dimensional disturbance modes. However, origin is still not well understood. In this paper, compressible mixing layers are performed via direct numerical simulation (DNS). Two typical types secondary instabilities producing consideration: fundamental instability and subharmonic instability. Based on fast Fourier transform DNS data, a low-rank velocity model v0 obtained to...
<title>Abstract</title> Mechanism restricting advancing contact line remains debated for drop impacts on cold solid substrates while lamella is spreading and solidifying simultaneously. We conducted experiments involving hexadecane drops at different temperatures below liquid freezing temperature with various impact velocities to observe dynamics. Due the similarity in temporal growth of viscous boundary layers, an effective layer thickness introduced estimate dissipation shear layer. As...
<title>Abstract</title> Spreading of liquid drops on cold solid substrates is a complicated problem that involves heat transfer, fluid dynamics, and phase change physics combined with complex wetting behaviors at the contact-line. Understanding behind non-isothermal spreading droplet utmost importance due to its broad applications in diverse areas industry such as additive manufacturing processes. This work mainly focuses determining important physical parameters involved droplets low...
The origin of initial streamwise vortices in braid regions and their relationship with deformed spanwise are numerically studied via direct numerical simulation (DNS) the compressible mixing layer a convective Mach number (Mc) 0.4. Through an analysis fast Fourier transform on DNS data, two low-rank velocity models (vd vs) developed to demonstrate that both all originated from linear superposition fundamental norm mode [mode (1, 0)], pair oblique modes [modes ±1)], mean mode. Further...