Jun Dong Email & Phone Number

Greater Chicago Area

Gainesville, Florida Area

Cryogenic Thermal-Fluids Lab• Coordinated with safety inspectors to ensure a healthy and safe lab environment.• Managed purchase receipt and reported project expense to the fiscal department.• Supervised and assisted undergraduate researchers on their projects.• Planned and made the Gantt charts for on-going research projects.• Created and presented PPT for the telecom meeting to report project progress to investigators.Demonstration of Optimal Chilldown Methods for Cryogenic Propellant Tanks in Reduced Gravity• Designed and integrated the test system to study in-space Charge-Hold-Vent cryogenic tank chilldown.• Communicated and cooperated with a machinist to fabricate the testing tank.• Performed the FEA analysis through Ansys static structural by the beam elements method to verify that the 8020 structure of the test system can hold under 9-g acceleration in all directions.• Developed the visualization inside the testing tank by the endoscopes from Amazon.• Wrote the research proposal report and explained the experiment to the parabolic flight provider for technical review.

Gainesville, Florida Area

Simulation of Heat Transfer Controlled Bubble Growth• Searched the literature for the liquid-vapor interface model as well as the phase change model.• Implemented the continuum surface force model with the height function calculating the interface curvature in C• Implemented the liquid evaporation model using Tanasawa formula in the user-subroutine as the phase change model for the bubble growth simulation• Created the mesh by Ansys ICEM and set up the Ansys Fluent solver to simulate the homogeneous bubble growth with self-coded phase change and surface tension models• Compared the simulated water bubble growth with Rayleigh solutionDevelopment of a Revolutionary Approach for Efficient Microgravity Transfer Line Chilldown • Designed and built the liquid nitrogen pipe chilldown experiment system to study the heat transfer enhancement by chemical coating• Drew fluid and instrumentation diagram by Visio and CAD models by SolidWorks• Designed and wired electrical and data acquisition system including Labview program• Selected and purchased relief valve, check valve, solenoid valve from vendors• Set up the procedures of operating the test system and trained team members to perform the test• Wrote the research proposal report detailing the experiment to ZeroG corporation for technical review• Led a team of 9 undergraduates and 3 graduate students to perform the ground tests and flight test on board a Boeing 727

Determination of Heat Transfer Coefficients for Two-Phase Flows of Cryogenic Propellants • Analyzed the UF’s liquid nitrogen pipe chilldown data and Glenn Research Center’s liquid hydrogen pipe chilldown data and developed semi-empirical correlations to predict film boiling heat transfer coefficient and rewet temperature• Programmed a user-subroutine code by Fortran and integrated it into the NASA’s Generalized Fluid System Simulation Program (GFSSP), which enables GFSSP to simulate the cryogenic pipe chilldown process accurately• Implemented the bench case simulations to show the performance of the new simulation algorithm• Wrote the report on how to use the user-subroutine for the GFSSP developersTurbulent Liquid Nitrogen Chilldown of a Pipe under Microgravity Condition• Designed and built the 8020 structure and fluid system of the test apparatus to perform the cryogenic pipe chilldown experiment on board a C-9 aircraft• Performed the FEA analysis on the structure of the test apparatus by Ansys static structural to prove the structure meet the “crash condition” requirement• Created the CAD models and fluid and instrumentation diagram for the technical presentation• Collaborated with another graduate student to lead a team of seven students into driving from Gainesville, FL to Houston, TX to perform experiment through reduced gravity flight• Evaluated the ground and flight test data and reported the chilldown results to the investigator from NASA Marshall and Glenn research center

High Temperature Steam Biomass Gasification• Designed and built the high temperature steam gasification system and numerically simulated resulted synthesis gas composition by chemical equilibrium model.• Developed a Labview program to monitior and record the sensor measurements of the gasification system including the temperatures across the reactor, the generated synthesis gas flow rate, and the gas composition readings from a mass spectrometer.• Performed the gasification experiment 60 times with wood, sewage sludge, municipal solid waste, plastics, and tires as feedstock. • Analyzed the experimental data by Matlab and evaluated the process in terms of carbon conversion and energy efficiency.• Troubleshot the broken Mass Spectrometer sampling line by replacing the clogged sampling line and set up operating procedures to avoid this malfunction.• Simulated the two-phase turbulent reactive transient flow inside a cylindrical gasifier by Ansys Fluent and compared the simulation results with the experiment results.

Doctor Of Philosophy - Phd, Mechanical Engineering, 3.8/4.0

Master Of Science (M.S.), Mechanical Engineering, Gpa 3.8/4.0

Bachelor Of Science (B.S.), Mechanical Engineering, Gpa 85/100