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  <title>Eunji Yoo's page</title>
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      <h1><strong>
          Today is my new favorite day!</h1>
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              <h2> Welcome to Eunji's page!</h2>
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            <h3>
              <p style="font-family: "Gill Sans", sans-serif">
                I am a postdoctoral researcher at the National Renewable Energy Laboratory (<a style = "color: #583759"; target="_blank" rel="noopener noreferrer" href="https://www.nrel.gov/">NREL</a>). My role includes implementing an improved <a style = "color: #1a386c"; target="_blank" rel="noopener noreferrer" href="https://amrex-codes.github.io/">AMReX</a> library code for complex geometry by reading an STL file within the embedded boundary. Having a triangulated surface in an STL format, this project aims to allow AMReX users to have broad options of solid objects for their research in CFD (Computational Fluid Dynamics). As I value my time with co-workers/teammates, I seek a workplace that can expand my knowledge in Applied Mathematics, help me grow professionally, and allow me to maintain a healthy work-life balance as a female researcher.
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              <p style="font-family: "Gill Sans", sans-serif">
              My primary research interests are modeling and developing stable, accurate, and efficient computational algorithms for multi-physics problems. I obtained my Ph.D. in Applied Mathematics at  <a style = "color: #538b01"; target="_blank" rel="noopener noreferrer" href="https://appliedmath.ucmerced.edu/">University of California, Merced</a>, in Summer 2023, under the co-supervision of Dr. Francois Blanchette and Dr. Shilpa Khatri. For my Ph.D. dissertation, I worked on modeling settling marine aggregates in a low Reynolds number regime. We use a boundary integral formulation evaluated with the <a style = "color: #1a386c"; target="_blank" rel="noopener noreferrer" href="https://github.com/flatironinstitute/FMM3D">Fast Multipole Method</a>, a least-square approximation, and finite difference schemes to obtain precise and efficient three-dimensional computation.
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In addition to my Ph.D. program, I participated twice in the NSF-MSGI (National Science Foundation Mathematical Sciences Graduate Internship) program. In the summer of 2021, under the mentorship of Dr. Michael Martin at NREL (National Renewable Energy Laboratory), we implemented a Python solver package to solve for properties of helium using its equation of state. I also spent the summer of 2022 at the Center for Computational Sciences and Engineering (CCSE) in LBNL under Dr.
Ishan Srivastava’s guidance. We implemented a pressure-dependent viscosity and a nonlinear
stress tensor to model complex fluids in the <a style = "color: #1a386c"; target="_blank" rel="noopener noreferrer" href="https://amrex-fluids.github.io/incflo/">AMReX-incflo</a>.
            </h3>
            <ul class="actions">
              <li><a target="_blank" href="./CV_Eyoo_Sep24.pdf" class="button">CV/Resume</a></li>
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              <h2>Recent Work</h2>
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                      <img src="images/figures/ocean_cartoon.jpg" class="image fit thumb" alt="" />
                    <h3> Settling of marine snow</h3>
                    <p> Marine aggregates are compositions of (in)organic matter that transfer Carbon Dioxide (CO<sub>2</sub> ) from the upper layer to the deep ocean to regulate atmospheric CO<sub>2</sub> levels. Their settling motion looks like snow in the ocean. </p>
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                      <img src="images/figures/fig_sample_all.jpg" class="image fit thumb" alt="" />
                    <h3> A new way to model aggregates!</h3>
                    <p> We generate marine aggregates with cubes! This allows us to capture more realistic shapes of aggregates.</p>

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                      <img src="images/figures/fig_streamlines_all.jpg" class="image fit thumb" alt="" />
                    <h3> Streamlines around a cube aggregate with various resolutions </h3>
                    <p> This is a sample of streamlines around aggregates. We can get more accurate lines with higher resolution. </p>

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                    <img src="images/figures/fig_streamlines.jpg" class="image fit thumb" alt="" />
                  <h3> General streamlines with 20 cubes</h3>
                  <p>  Check out our recent work below! </p>
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                    <li><a target="_blank" rel="noopener noreferrer" href="https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.5.044305" class="button">Full Text</a></li>
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                  <img src="images/figures/snapshot_settling.png" class="image fit thumb" alt="" />
                  <h3> Concentration simulation of settling aggregate</h3>
                  <p> We currently work on settling simulation with advection-diffusion equation in Stokes regime. </p>

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                    <li><a target="_blank" rel="noopener noreferrer" href="./movies/gauss5_d_p2_Nt500_YZ.mp4" class="button">Movie here</a></li>
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