Education

• Ph. D., Mechanical Engineering, University of South Carolina, 2011
• M.E., Mechanical Engineering, University of South Carolina, 2007
• B.S., Mechanical Engineering, Xi'an Jiaotong University, 1997

Background

Dr. Fang's research and interests are in the areas of:

• Thermal-hydraulic safety analysis of advanced small modular reactor
• Predictive modeling, sensitivity/uncertainty method for critical/subcritical nuclear systems
• Heat transfer and fluid flow with phase changes
• Applied Computational Fluid Dynamic (CFD)
• Thermal management of power electronics
• Micro-channels and synthetic jets
• System-level thermal modeling and simulation

Publications

1. Ruixian Fang and Dan G. Cacuci, 2022, Fourth-Order Adjoint Sensitivity and Uncertainty Analysis of an OECD/NEA Reactor Physics Benchmark: II. Computed Response Uncertainties”. J. Nucl. Eng., 3, 1–16.
2.  Ruixian Fang and Dan G. Cacuci, 2021, Fourth-Order Adjoint Sensitivity and Uncertainty Analysis of an OECD/NEA Reactor Physics Benchmark: I. Computed Sensitivities”. J. Nucl. Eng., 2, 281–308.
3. Dan G. Cacuci and Ruixian Fang, 2021, “Fourth-Order Adjoint Sensitivity Analysis of an OECD/NEA Reactor Physics Benchmark: I. Mathematical Expressions and CPU-Time Comparisons for Computing 1st-, 2nd- and 3rd-Order Sensitivities. American Journal of Computational Mathematics, 11, 94-132.
4. Dan G. Cacuci and Ruixian Fang, 2021, “Fourth-Order Adjoint Sensitivity Analysis of an OECD/NEA Reactor Physics Benchmark: II. Mathematical Expressions and CPU-Time Comparisons for Computing 4th-Order Sensitivities. American Journal of Computational Mathematics, 11, 133-156.
5. Dan G. Cacuci and Ruixian Fang, 2020, “Third-Order Adjoint Sensitivity Analysis of an OECD/NEA Reactor Physics Benchmark: I. Mathematical Framework,” American Journal of Computational Mathematics, 10, 503-528.
6. Ruixian Fang and Dan G. Cacuci, 2020, “Third-Order Adjoint Sensitivity Analysis of an OECD/NEA Reactor Physics Benchmark: II. Computed Sensitivities,” American Journal of Computational Mathematics, 10, 529-558.
7. Ruixian Fang and Dan G. Cacuci, 2020, “Third-Order Adjoint Sensitivity Analysis of an OECD/NEA Reactor Physics Benchmark: III. Response Moments,” American Journal of Computational Mathematics, 10, 559-570.
8. Ruixian Fang and Dan G. Cacuci, 2020, “Comprehensive Second-Order Adjoint Sensitivity Analysis Methodology (2nd-ASAM) Applied to a Subcritical Experimental Reactor Physics Benchmark: IV. Effects of Imprecisely Known Source Parameters,” Energies, 13, 1431.
9. Ruixian Fang and Dan G. Cacuci, 2020, “Comprehensive Second-Order Adjoint Sensitivity Analysis Methodology (2nd-ASAM) Applied to a Subcritical Experimental Reactor Physics Benchmark: V. Computation of Mixed 2nd-Order Sensitivities Involving Isotopic Number Densities,” Energies, 13, 2580.
10. Dan G. Cacuci, Ruixian Fang, Jeffery A. Favorite, 2020, “Comprehensive Second-Order Adjoint Sensitivity Analysis Methodology (2nd-ASAM) Applied to a Subcritical Experimental Reactor Physics Benchmark: VI. Overall Impact of 1st- and 2nd-Order Sensitivities on Response Uncertainties,” Energies, 13(7), 1674.
11. Saad K Oudah, Ruixian Fang, Amitav Tikadar, Azzam Salman, Jamil A Khan, 2020, “An Experimental Investigation of the Effect of Multiple Inlet Restrictors on the Heat Transfer and Pressure Drop in a Flow Boiling Microchannel Heat Sink,” International Journal of Heat and Mass Transfer, 153, 119582.
12. Dan G. Cacuci, Ruixian Fang, Jeffery A. Favorite, 2019, “Comprehensive Second-Order Adjoint Sensitivity Analysis Methodology (2nd-ASAM) Applied to a Subcritical Experimental Reactor Physics Benchmark: I. Effects of Imprecisely Known Microscopic Total and Capture Cross Sections,” Energies, 12, 4219.
13. Ruixian Fang and Dan G. Cacuci, 2019, “Comprehensive Second-Order Adjoint Sensitivity Analysis Methodology (2nd-ASAM) Applied to a Subcritical Experimental Reactor Physics Benchmark: II. Effects of Imprecisely Known Microscopic Scattering Cross Sections,” Energies, 12, 4114.
14. Dan G. Cacuci, Ruixian Fang, Jeffery A. Favorite, Madalina C. Badea, Federico Di Rocco, 2019, “Comprehensive Second-Order Adjoint Sensitivity Analysis Methodology (2nd-ASAM) Applied to a Subcritical Experimental Reactor Physics Benchmark: III. Effects of Imprecisely Known Microscopic Fission Cross Sections and Average Number of Neutrons per Fission,” Energies, 12, 4100.
15. Dan G. Cacuci, Ruixian Fang, and Madalina C. Badea, 2018, “MULTI-PRED: A Software Module for Predictive Modeling of Coupled Multi-Physics Systems,” Nuclear Science and Engineering, 191 (2), 187-202.
16. Saad K Oudah, Amitav Tikadar, Ruixian Fang, Karim Egab, Jamil A Khan, 2018, “Thermohydraulic Characteristics of a Knurled microchannel Heat Sink in Single Phase Regime,” 3rd Thermal and Fluids Engineering Conference (TFEC 2018),pp. 1425-1436, Fort Lauderdale, Fl.
17. Ruixian Fang, Dan G. Cacuci and Madalina C. Badea, 2017, “Sensitivity and Uncertainty Analysis of Counter-flow Mechanical Draft Cooling Towers Operating under Saturated Conditions. II: Predictive Modeling,” Nuclear Technology, 198 (2), 132-192.
18. Dan G. Cacuci, Ruixian Fang, 2017, “Sensitivity and Uncertainty Analysis of Counter-flow Mechanical Draft Cooling Towers Operating under Saturated Conditions: I. Adjoint Sensitivity Model. I: Adjoint Sensitivity Models,” Nuclear Technology, 198 (2), 85-131.
19. Saad K Oudah, Ruixian Fang, Amitav Tikadar, Karim Egab, Chen Li, Jamil A Khan, 2017, “The Effects of Hybrid Sandblasting Patterns on the Heat Transfer Performance in a Single-Phase Microchannel Heat Sink,” ASME 2017 International Mechanical Engineering Congress and Exposition (IMECE 2017), V008T10A024-V008T10A024, Tampa, Fl.
20. Ruixian Fang, Dan G. Cacuci and Madalina C. Badea, 2016, “Predictive Modelling of a Paradigm Mechanical Cooling Tower. II: Optimal Best-Estimate Predictions with Reduced Uncertainties,” Energies, 9, 747 (2016); http://dx.doi.org/10.3390/en9090747. 
21. Dan G. Cacuci, Ruixian Fang, 2016, “Predictive Modelling of a Paradigm Mechanical Cooling Tower. I: Adjoint Sensitivity Model,” Energies, 9, 718 (2016); http://dx.doi.org/10.3390/en9090718.
22. Dan Cacuci, Ruixian Fang, Milica Ilic, and Madalina C. Badea, 2016, “A Heat Conduction and Convection Analytical Benchmark for Adjoint Solution Verification of Computational Fluid Dynamics Codes Used in Reactor Design”, Nuclear Science and Engineering, 182(4), pp.452-480.
23. D.G. Cacuci, M. Ilic, M.C. Badea and R. Fang, 2015, “Second-Order Adjoint Sensitivity and Uncertainty Analysis of a Heat Transport Benchmark Problem—II: Computational Results Using G4M Reactor Thermal-Hydraulic Parameters”, Nuclear Science and Engineering, 183(1), pp.22-38.
24. Dan G. Cacuci, Ruixian Fang, Madalina C. Badea and Milica Ilic, 2015, “A Heat Transport Analytical Benchmark Problem for Sensitivity Analysis, Uncertainty Quantification and Predictive Modeling: I: Verification of the FLUENT Adjoint Solver”, Transactions of the American Nuclear Society; 113, 1381-1384, 2015.
25. Jamil A. Khan, A.K.M.M. Morshed and Ruixian Fang, 2014,” Towards Ultra-Compact High Heat Flux Microchannel Heat Sink,” Procedia Engineering, Volume 90, pp. 11 – 24. doi: 10.1016/j.proeng.2014.11.798.
26. Ruixian Fang and Jamil Khan, 2013, “Suppression of Two-Phase Flow Instabilities in Parallel Microchannels by using Synthetic Jets”, Journal of Heat Transfer. 135(11), 111016, pages.1-13.
27. Ruixian Fang, Jamil Khan, 2013,” Active Heat Transfer Enhancement in Single-Phase Microchannels by using Synthetic Jets”, Journal of Thermal Science and Engineering Applications, 5, 011006, pages 1-9.
28. Xianming Dai, Fanghao Yang, Ruixian Fang, and Chen Li, 2013, “Enhanced single- and two-phase transport phenomena using flow separation in a microgap with copper woven mesh coatings”, Applied Thermal Engineering, 54(1), 281-288.
29. E. Thirunavukarasu, R. Fang, J. A. Khan, and R. Dougal, 2013, “Evaluation of gas turbine engine dynamic interaction with electrical and thermal system,” 2013 IEEE Electric Ship Technologies Symposium (ESTS-2013), pp.442-448, Arlington, VA.
30. Ruixian Fang, Wei Jiang and Jamil Khan, 2012, “The Effects of a Cross-Flow Synthetic Jet on Single-Phase Microchannel Heat Transfer”, Journal of Enhanced Heat Transfer, 19(4), pp.343-358.
31. Ruixian Fang and Jamil Khan, 2012,” Experimental Study on the Effect of Synthetic Jets on Flow Boiling Heat Transfer in Microchannels”, ASME 2012 10th International Conference on Nanochannels, Microchannels and Minichannels (ICNMM-2012), Rio Grande, Puerto Rico.
32. A.K.M.M. Morshed, Titan C. Paul, Ruixian Fang, and Jamil A. Khan, 2012,” Flow Boiling Characteristics of Dilute Emulsion in Microchannel,” ASME 2012 International Mechanical Engineering Congress and Exposition (IMECE-2012), Volume 7, pp. 2085-2091. doi:10.1115/IMECE2012-88310, Houston, TX.
33. B. A Correa, Y. Zhang, R. Fang, R. A. Dougal, 2012, ” Driving a synchronous motor so that it emulates a twin-shaft gas turbine engine,” 6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012), DOI: 10.1049/cp.2012.0296.
34. E. Thirunavukarasu, R. Fang, and J. A. Khan, and Roger Dougal, 2012, “Modeling and Simulation of Gas Turbine System on a Virtual Test Bed (VTB),” ASME 2012 International Mechanical Engineering Congress and Exposition (IMECE 2012), pp. 337-346.
35. Ruixian Fang and Jamil Khan, 2011,” Experimental Study on the Effect of Synthetic Jets on Flow Boiling Instability in a Microchannel”, ASME 2011 9th International Conference on Nanochannels, Microchannels and Minichannels, Edmonton (ICNMM-2011), Alberta, Canada.
36. Ruixian Fang, Wei Jiang, Jamil Khan and Roger Dougal, 2011 “Thermal Modeling and Simulation of the Chilled Water System for Future All Electric Ship”, IEEE Electric Ship Technologies Symposium (ESTS 2011), pp. 265-271, Alexandria, VA.
37. M.Y. Ali, F. Yang, R. Fang, C. Li, and J.A. Khan, 2011, “Thermohydraulic Characteristics of a Single-Phase Microchannel Heat Sink Coated with Copper Nanowires”. Frontiers in Heat and Mass Transfer (FHMT), Volume 2, No. 3, 033003.
38. Ruixian Fang, Wei Jiang, Jamil Khan and Roger Dougal, 2010, “Experimental Heat Transfer Enhancement in Single-phase Liquid Microchannel Cooling”, 14th International Heat Transfer Conference (IHTC14). Aug. 7-13, 2010. Washington D.C., USA. Paper No. IHTC14-23020, pp. 681-689.
39. J.A. Khan, T.W. Knight, S.B. Pakala, W. Jiang, R. Fang, J.S. Tulenko, 2010, “Enhanced Thermal Conductivity for LWR Fuel”, Nuclear Technology, 169(1), pg. 61-72.
40. Wei Jiang, Ruixian Fang, Roger Dougal, and Jamil khan, 2010, “Control Strategies for Start-up and Part-Load Operation of Solid Oxide Fuel Cell / Gas Turbine Hybrid System”, Journal of Fuel Cell Science and Technology, ASME, 7(1), pp. 011-016 doi:10.1115/1.3006197.
41. Ruixian Fang, Wei Jiang, Jamil Khan and Roger Dougal, 2009, “System-Level Thermo Modeling and Co-simulation with Hybrid Power System for Future All Electric Ship”, 2009 IEEE Electric Ship Technologies Symposium (ESTS-2009), pp.547-553, Baltimore, VA.
42. Ruixian Fang, Wei Jiang, Jamil Khan, and Roger Dougal, 2009, “Experimental Heat Transfer Enhancement for Single Phase Liquid Micro-Channel Cooling Using A Micro-Synthetic Jet Actuator”, ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, (MNHMT-2009), Shanghai, China.
43. Wei Jiang, Ruixian Fang, Roger Dougal, and Jamil khan, 2008, “Thermo-electric Model of a Tubular SOFC for Dynamic simulation,” ASME, Journal of Energy Resources Technology, 2008, Vol. 130 (2), pg. 022601-1.
44. Ruixian Fang, Wei Jiang, A. Monti, M. Zerby, G. Anderson, P. Bernotas, J. Khan, 2007, “System-Level Dynamic Thermal Modeling and Simulation for an All-Electric Ship Cooling System in VTB”. 2007 IEEE Electric Ship Technologies Symposium (ESTS-2007), pp462-469, Arlington, VA, 2007.
45. Wei Jiang, Ruixian Fang, Jamil Khan, and Roger A. Dougal, 2007, “Performance prediction and dynamic simulation of electric ship hybrid power system”. 2007 IEEE Electric Ship Technologies Symposium (ESTS-2007), pp 490-497, Arlington, VA, 2007.
46. T. Chiocchio, R. Leonard, Y. Work, R. Fang, M. Steurer, A. Monti, J.A. Khan, M. Sloderbeck, S.L. Woodruff, 2007, “A co-simulation approach for real-time transient analysis of electro-thermal system interactions on board of future all-electric ships”. 2007 summer computer simulation conference (SCSC-2007). San Diego, CA.
47. Wei Jiang, Ruixian Fang, Roger A. Dougal, and Jamil Khan, 2006, “Parameter Setting and Analysis of a Dynamic Tubular SOFC Model”. Journal of Power Sources, 162(1), pp. 316-326.