Yuqiao (Joy) FAN, Ph.D.

- Liquid metal MHD simulation in the blanket of the fusion reactor. Study MHD pressure drop for optimization of the liquid metal supply system. - Simulation and assessment of new liquid metal blanket candidate for the US fusion pilot plant. - Cryogenic hydrogen extrusion simulation for forming pellets used for injection into fusion plasmas and to add fuel for fusion reactions. - Co-PI of ORNL LDRD project, "Predictive modeling of Helium flow with validation"

• Integrated proportional–integral–derivative (PID) control with level-set method in PHASTA code; achieved highly scalable, efficient, accurate, and robust two-phase flow rate control • Applied PID flow rate control to study Counter Current Flow Limitation (CCFL) in light water reactor (LWR) debris bed channels; developed correlations and dimensionless numbers to predict CCFL occurrence and for safety analysis in severe accident scenarios • Developed novel gravity control method and added this new capability into existing PID bubble controller; achieved more accurate bubble simulation results for verification and validation (V&V) • Applied bubble controller on closure development of bubble interfacial forces as well as deformation and break-up regimes with validation from experimental research • Diagnosed contact angle algorithm for interface capturing boiling • Conducted pool boiling simulations with multiple nucleation sites; concluded bubble departure behaviors under different nucleation site patterns, site distances, and heat fluxes • Carried out heat transfer validation of PHASTA code through single phase particle simulations

Awarded Mentored Teaching Fellowship (only 10 awards per College of Engineering) for active involvements in graduate-level course NE/MAE 577 Multiscale Two-Phase Flow Simulations, including the creation of homework and exam problems, teaching lectures, and holding homework review sessions

• Conducted high resolution simulations of lift and drag forces on bubbles at high shear rates • Developed closures of interfacial forces for Eulerian-Eulerian baseline models

- Conducted two-phase Reynolds Averaged Navier Stokes (RANS) simulations using Star-CCM+ on departure from nucleate boiling in a cylindrical channel, and contributed to user-defined function improvement, model validation, and uncertainty quantification (UQ) - Completed the first documentation of FY19 CASL boiling models user guide with CFD best practices - Performed bug-hunting and solution verification of nek4nuc (integrated Nek5000 into NEAMS Workbench) via turbulent simulations of pipe channel - Applied nek4nuc in turbulent flow characteristics study of High Flux Isotope Reactor (HFIR) cooling channel (high-speed flow with Re=7E4) with Large Eddy Simulations (LESs); developed wall models for HFIR channel to enlighten RANS by LES solutions

Group project of starting up a software company providing consulting service. Incorporate pre-existing technology, i.e. machine learning data analytics, facial recognition etc. to digitize and reduce operation and maintenance (O&M) costs for existing nuclear power plants. By finding redundancies in plant operation through large data collection, it is possible to reduce excessive and repeated work.

Lab-on-wheels is a high school outreach program held every spring to give students significant hands-on experience with current biotechnology. As a TA in 2017 session, I instructed Huron and Skyline high school students from 15 classes to engage in gel electrophoresis experiments (including micropipette usage) and to explore online gene sequences in their biology classrooms.

Being the GSI (Graduate Student Instructor, analogous to Teaching Assistant) for the course NERS 444, Thermal-hydraulics for Nuclear Systems, I hold office hours, grade students' assignment and summarized their mistakes for the instructor every week. I always try to help students understand how to develop a logic for dealing with homework problems and the heat transfer theory behind the exercises.

Funded by Nuclear Regulatory Commission, the experimental system was designed for a water-air 5x5 fuel bundle to test a gamma tomography system on obtaining subchannel averaged void fractions. A bubble injector was designed at the bottom of each rod to introduce the gas phase with the capability for non-uniform injection rates. MCNP was used to simulate the experimental measurement to collect the photon count rates on detectors after the X-rays went through an Incoloy tube with film boiling regimes IAFB and ISFB inside. The flow regimes for IAFB and ISFB in the tube was reconstructed through coding with MATLAB Wire mesh data of two-phase flows were acquired at a bubble column facility. MATLAB is used to analyze the data to realize a 3D visualization of the measured bubbles and flows.

- Conducted shakedown tests on large-scale experimental facility of partial scaled tube bundles at secondary side in steam generator of CAP1400 - Studied the flow and heat transfer characteristics by experiments and simulations (ANSYS-FLUENT) and developed correlations for friction loss of tube bundles - This projected was awarded as Outstanding Graduation Thesis (Top 1%). - Fulfilled the V&V of the developed code, MIDAC (Module In-vessel Damage Severe Accident).

Working with Prof. Huihe Qiu on an experimental study of pool boiling on both nanostructured and homogeneous cylindrical surfaces was carried out with high speed camera, infrared camera and other advanced instruments. The heat transfer performances of the nanostructured and homogenous surfaces were compared to prove the advantageous heat transfer properties of nanostructure.

- Graduated with the Outstanding Graduation Thesis (Top 1%).