See our new website: https://feng.mech.utah.edu

Invited/Seminar Talks:

• 11/2018. Invited Talk. Tianli Feng, Xiulin Ruan, invited talk, "four-phonon scattering: an important mechanism neglected for decades", IMECE conference, Pittsburgh, Nov. 2018 

• 02/2018. Seminar Talk. Tianli Feng, “Theoretical phonon spectroscopy using predictive atomistic simulations", Condensed Matter & Optics Seminars, Vanderbilt Univ., Feb 2018.

• 08/2017. Invited Talk. Tianli Feng, "Theoretical Phonon Spectroscopy Using Predictive Atomistic Simulations'', University of Minnesota Twin Cities, Aug. 8th - Aug. 11th, 2017

• 07/2017. Invited Talk. Tianli Feng, "Theoretical Phonon Spectroscopy Using Predictive Atomistic Simulations'', Computational Material Online Seminar, Jul. 21st, 2017

• 01/2016. Seminar Talk. Tianli Feng, “Prediction of Spectral Phonon Mean Free Path and Thermal Conductivity for Thermal Management and Thermoelectrics", Nano TE/thermal Seminars, Purdue Univ., January 2016.

• 08/2014. Seminar Talk. Tianli Feng, “On the prediction of spectral phonon mean free path and accumulated thermal conductivity", Nano TE/thermal Seminars, Purdue Univ., August 2014.

Conferences:

2020:

• Tianli Feng, “Revealing Energy Accommodation Between Gases and Polymers for High-Efficiency Thermal Insulation”, ASME 2020 International Mechanical Engineering Congress & Exposition (IMECE), Virtual Conference. 2020.

•  Tianli Feng, “Discovering Size Effect of Thermal Conductivity of Amorphous Polymers”, ASME 2020 International Mechanical Engineering Congress & Exposition (IMECE), Virtual Conference. 2020.

2019:

• Tianli Feng, oral presentation, Interfacial Thermal Transport Based on Mode-Resolved Non-Equilibrium Molecular Dynamics Simulations, MRS spring meeting, Phoenix, AZ, April 2019.

• Tianli Feng, oral presentation, Ultra-Low and Anisotropic Thermal Conductivities of Quasi-1D ZrTe5 and HfTe5 Single Crystals, MRS spring meeting, Phoenix, AZ, April 2019.

2018:

• Tianli Feng and Sokrates Pantelides, oral presentation, Ultra-low and anisotropic thermal conductivity of quasi-1D single-crystalline ZrTe5, MRS, Boston, Nov. 2018

• Tianli Feng, Xiaolong Yang, Xiulin Ruan, invited talk, four-phonon scattering: a neglected mechanism for decades, IMECE, Pittsburgh, Nov. 2018 

• Tianli Feng, Xiaolong Yang, Xiulin Ruan and Sokrates Pantelides, oral presentation, First-Principles Prediction of Temperature-Dependent Phonon Energy Shifts, IMECE, Pittsburgh, Nov. 2018

• Tianli Feng and Sokrates Pantelides, Poster, First-Principles Prediction of Temperature-Dependent Phonon Energy Shifts of Boron Nitride, VPA poster, Vanderbilt University, April 15, 2018

• Tianli Feng and Sokrates Pantelides, oral presentation, Accurate First-Principles Prediction of Temperature-Dependent Phonon Energy Shifts, American Physical Society APS march Meeting, Los Angeles, California from March 5 - 9, 2018

2017:

• Tianli Feng and Xiulin Ruan, oral presentation, Four-phonon scattering substantially impacts thermal conductivity in graphene, IMECE2017-73396, ASME 2017 International Mechanical Engineering Congress & Exposition (IMECE), Tampa, Florida, November 3-9, 2017

• Tianli Feng and Xiulin Ruan, oral presentation, Spectral non-equilibrium molecular dynamics, IMECE2017-73359, ASME 2017 International Mechanical Engineering Congress & Exposition (IMECE), Tampa, Florida, November 3-9, 2017

• Tianli Feng and Xiulin Ruan, oral presentation, First principles predictions of temperature-dependent phonon dispersion, IMECE2017-73289, ASME 2017 International Mechanical Engineering Congress & Exposition (IMECE), Tampa, Florida, November 3-9, 2017

• Xuewang Wu, Jeff Walter, Tianli Feng, Jie Zhu, Xiulin Ruan, Chris Leighton, and Xiaojia Wang, presentation, Glass-Like Through-Plane Thermal Conductivity Induced by Oxygen Vacancies in Nanoscale Epitaxial LSCO, IMECE2017-71801, International Mechanical Engineering Congress & Exposition (IMECE), Tampa, Florida, November 3-9, 2017

• Divya Chalise, Tianli Feng and Xiulin Ruan, poster on "Spectral phonon relaxation time calculation tool" Nanohub Poster, Purdue University, West Lafayette, Indiana, August 2017.

• Yang Zhong, Tianli Feng and Xiulin Ruan, poster on "Modal phonon transport across interfaces by non-equilibrium molecular dynamics" Summer undergraduate research fellow (SURF) Poster, Purdue University, West Lafayette, Indiana, August 2017.

• Divya Chalise, Tianli Feng and Xiulin Ruan, presentation on "Spectral phonon relaxation time calculation tool" Summer undergraduate research fellow (SURF) Presentation, Purdue University, West Lafayette, Indiana, August 2017.

2016:

• Tianli Feng and Xiulin Ruan, presentation on "Phonon transport in defected graphene and graphene nanomesh" IMECE67496, ASME 2016 International Mechanical Engineering Congress & Exposition (IMECE), Phoenix, Arizona, November 2016.

• Tianli Feng and Xiulin Ruan, presentation on "First principles prediction of importance of four-phonon scattering in Si and BAs" IMECE67536, ASME 2016 International Mechanical Engineering Congress & Exposition (IMECE), Phoenix, Arizona, November 2016.

• Tianli Feng, Wenjun Yao, Zuyuan Wang, Jingjing Shi, Chuang Li, Bingyang Cao, and Xiulin Ruan*, presentation on "Spectral phonon temperature as an effective tool to predict the ballistic and diffusive transport in nanomaterials and across interfaces" IMECE67550, ASME 2016 International Mechanical Engineering Congress & Exposition (IMECE), Phoenix, Arizona, November 2016.

2015:

• Tianli Feng, Bo Qiu, and Xiulin Ruan, presentation on “Coupling between Phonon-Phonon and Phonon-Impurity Scattering: A Critical Revisit of the Spectral Matthiessen's Rule”, ASME 2015 International Mechanical Engineering Congress & Exposition (IMECE), Houston, Texas, November 2015.

• Tianli Feng and Xiulin Ruan, presentation on “Quantum mechanical prediction of four-phonon scattering rates and reduced thermal conductivity of solids”, ASME 2015 International Mechanical Engineering Congress & Exposition (IMECE), Houston, Texas, November 2015.

2014:

• Yan Wang, Tianli Feng, Jingjing Shi, Zexi Lu, and Xiulin Ruan, presentation on "Mode-resolved Boltzmann transport simulation of electron-phonon coupled thermal transport in metal-dielectric heterojunctions," ASME 2014 Mechanical Engineering Congress & Exposition, Montreal, Canada, November 2014.

• Tianli Feng, Bo Qiu, and Xiulin Ruan, presentation, "Coupling between Phonon-Phonon and Phonon-Impurity Scattering: A Critical Revisit of the Matthiessen's Rule" 32nd International Thermal Conductivity Conference (ITCC) & 20th International Expansion Symposium (IES), West Lafayette, Indiana, April 2014.

2013:

• Tianli Feng, Bo Qiu, and Xiulin Ruan, poster on "Mode-Resolved Phonon Transport Properties of Materials by Normal Mode Analysis", 2013 MRS Spring Meeting & Exhibit, San Francisco, California, April 2013.