Bharadwaj Vangipuram's Personal Website

About

Hi, I am Hamidreza Khoshtarash, a PhD student in Civil and Environmental Engineering at the University of California, Davis. I hold a master’s degree in Mechanical Engineering, where I graduated ranked 1st and among the top 3% of my department, and was honored as the best student.

I specialize in numerical modeling and simulation, using techniques such as finite volume and finite element methods. I also enjoy contributing to open-source software development, and proficient in a range of technical tools.

My goal is to develop robust models that not only deepen scientific understanding but also support practical solutions for real-world environmental problems.
CV

Projects

Biofilms in Porous Media

This research focuses on how bacteria grow and behave in soils and similar porous materials. Bacteria produce something called biofilms, slimy protective layers, that help them survive harsh conditions. These biofilms are mostly water and surprisingly, they can be permeable. We are trying to understand how easily water can move through them this is called permeability. The goal is, to better understand these interactions, which can help in fields like water purification, agriculture, and environmental restoration.

Nanoparticle Deposition/Eulerian-lagrangian

Understanding nanoparticle transport in porous media is critical due to its multiscale nature and influence on flow behavior. Conventional models often miss pore-level effects, where particle-surface interactions dominate. To address this, we develop a pore-scale Eulerian-Lagrangian solver in OpenFOAM to simulate nanoparticle deposition in sandstone and metal foams. we develop a new code for simulation the Eulerian-Lagrangian method in this study and results show that porosity, surface charge, and Brownian motion strongly affect deposition, especially for particles under 100 nm.

Nanofluid Flow/Porous Media/Brownian Effects

This study uses pore-scale simulations to explore how nanofluids flow and transfer heat in metal foams. By modeling two-phase flow with Brownian motion effects, we show how factors like pore density, nanoparticle size, and concentration impact heat transfer and flow. Results reveal that fine-tuning these parameters can significantly enhance thermal performance while affecting flow resistance.

Papers

M. Ramezanpour, M. Siavashi, H. Khoshtarash, M. J. Blun: Transport and deposition of nanoparticles in porous media at the pore scale using an Eulerian-Lagrangian method, Journal of Energy Storage (2024).

H. Khoshtarash, M. Siavashi, M. Ramezanpour, M. J. Blunt: Pore-scale analysis of two-phase nanofluid flow and heat transfer in open-cell metal foams considering Brownian motion, Applied Thermal Engineering (2023).

AN. Sadr, M. Shekaramiz, M. Zarinfar, A, Esmaily,H. Khoshtarash, D. Toghraie: Simulation of mixed-convection of water and nano-encapsulated phase change material inside a square cavity with a rotating hot cylinder, Journal of Energy Storage (2023).

Contact

• Instagram
• GitHub

Elements

i = 0;

while (!deck.isInOrder()) {
    print 'Iteration ' + i;
    deck.shuffle();
    i++;
}

print 'It took ' + i + ' iterations to sort the deck.';