2024 and in press
- X Ruan, MT Gorman, R Ni. “Effects of electrostatic interaction on clustering and collision of bidispersed inertial particles in homogeneous and isotropic turbulence.” Journal of Fluid Mechanics 980, A29
- M Gorman, X Ruan, R Ni. “Electrostatic interactions between rough dielectric particles.” Physical Review E 109 (3), 034902
- Y. Zhang, H. Ko, M.A. Calicchia, R. Ni, G.V. Lauder. “Collective movement of schooling fish reduces the costs of locomotion in turbulent conditions.” PLoS Biol 22(6):e3002501.
- S. Zhong, R. Ni. “On the breakup frequency of bubbles and droplets in turbulence: A compilation and evaluation of experimental data.” International Journal of Multiphase Flow. Pre-proof, 104842.
- M.T. Gorman, X. Ruan, R. Ni. “Electrostatic interactions between rough dielectric particles.”
Physical Review E. 109 (3), 034902. - Y. Qi, X. Xu, S. Tan, S. Zhong, Q. Wu, R. Ni. “Breaking bubbles across multiple time scales in turbulence.”
Journal of Fluid Mechanics. 983, A24. - X. Ruan, M.T. Gorman, R. Ni. “Effects of electrostatic interaction on clustering and collision of bidispersed inertial particles in homogeneous and isotropic turbulence.“
Journal of Fluid Mechanics. 980, A29. - R. Ni. “Deformation and breakup of bubbles and drops in turbulence.”
Annual Review of Fluid Mechanics. 56, 319-347.
2023
- M.T. Gorman, J.S. Rubio, M.X. Diaz-Lopez, W.A. Chambers, A.M. Korzun, J. Rabinovitch, R. Ni. “Scaling laws of plume-induced granular cratering.”
PNAS Nexus. 2(9), pgad300. - S. Zhong, R. Ni. “On the breakup frequency of bubbles and droplets in turbulence: a compilation and evaluation of experimental data.”
arXiv preprint. arXiv:2308.13990. - J. Lu, X. Xu, S. Zhong, R. Ni, G. Tryggvason. “The dynamics of suspensions of prolate spheroidal particles—Effects of volume fraction.”
International Journal of Multiphase Flow. 165, 104469. - M.A. Calicchia, R. Mittal, J. Seo, R. Ni. “Reconstructing the pressure field around swimming fish using a physics-informed neural network.”
Journal of Experimental Biology. 226, jeb244983. Download - Y. Qi, C. Meneveau, G. Voth, R. Ni. “Folding dynamics and its intermittency in turbulence.”
Physical Review Letters. 130, 154001. Download
Selected as the cover article. - S. Tan, S. Zhong, R. Ni. “3D Lagrangian tracking of polydispersed bubbles at high image densities.”
Experiments in Fluids. 64(4), 85. - S. Tan, X. Xu, Y. Qi, R. Ni. “Scalings and decay of homogeneous, nearly isotropic turbulence behind a jet array.”
Physical Review Fluids. 8, 024603. Download
Selected as Editors’ Suggestion.
2022
- X. Ruan, M.T. Gorman, S. Li, R. Ni. “Surface-resolved dynamic simulation of charged non-spherical particles.”
Journal of Computational Physics. 466, 111381. Download - S. Tan, R. Ni. “Universality and intermittency of pair dispersion in turbulence.”
Physical Review Letters. 128 (11), 114502. Download - Y. Qi, S. Tan, N. Corbitt, C. Urbanik, A.K.R., Salibindla, R. Ni. “Fragmentation in turbulence by small eddies.”
Nature Communications. 13. Download - M.X. Diaz-Lopez, M.T. Gorman, J.S. Rubio, R. Ni. “Plume-surface interaction physics focused ground test 1: Diagnostics and preliminary results.”
AIAA SCITECH 2022 Forum. - J.S. Rubio, M.T. Gorman, M.X. Diaz-Lopez, R. Ni. “Plume-surface interaction physics focused ground test 1: Setup and preliminary results.”
AIAA SCITECH 2022 Forum.
2021
- A.U.M. Masuk, Y. Qi, A.K.R. Salibindla, R. Ni. “Towards a phenomenological model on the deformation and orientation dynamics of finite-sized bubbles in both quiescent and turbulent media.”
Journal of Fluid Mechanics. 920. Download - X. Li, S. Huang, R. Ni, K. Xia. “Lagrangian velocity and acceleration measurements in plume-rich regions of turbulent Rayleigh-Bénard convection“.
Physical Review Fluids. 6 (5), 053503 - A.U.M. Masuk, A.K.R. Salibindla, R. Ni. “The oriental dynamics of deformable finite-sized bubbles in turbulence.“
Journal of Fluid Mechanics. 915. Download - A.K.R. Salibindla, A.U.M. Masuk, R. Ni. “Experimental investigation of the acceleration statistics and added-mass force of deformable bubbles in intense turbulence.”
Journal of Fluid Mechanics. 912. Download - A.U.M. Masuk, A.K.R. Salibindla, R. Ni. “Simultaneous measurements of deforming Hinze-scale bubbles with surrounding turbulence.”
Journal of Fluid Mechanics. 910. Download
2020
- Y. Qi, Mohammad Masuk AU, R. Ni. “Towards a model of bubble breakup in turbulence through experimental constraints.”
International Journal of Multiphase Flow. 132. Download - S. Tan, A. Salibindla, A. U. M. Masuk, and R. Ni. “Introducing OpenLPT: new method of removing ghost particles and high-concentration particle shadow tracking.“
Experiments in Fluids. 61. Download - R. Mittal, R. Ni, J.H. Seo. “The flow physics of COVID-19.”
Journal of Fluid Mechanics. 894. Download - A.K.R. Salibindla, A.U.M. Masuk, S. Tan, R. Ni. “Lift and drag coefficients of deformable bubbles in intense turbulence determined from bubble rise velocity.“
Journal of Fluid Mechanics. 894. Download
2019
- A. U. M. Masuk, A. Salibindla, and R. Ni. “A robust virtual-camera 3D shape reconstruction of deforming bubbles droplets with additional physical constraints.”
International Journal of Multiphase Flow, 120, 103088 (2019). Download - A.U.M. Masuk, A. Salibindla, S. Tan, R. Ni. “V-ONSET (Vertical Octagonal Noncorrosive Stirred Energetic Turbulence): A vertical water tunnel with a large energy dissipation rate to study bubble/droplet deformation and breakup in strong turbulence“.
Review of Scientific Instruments, 90 (8), (2019) Download - M. Sinhuber, K. Van Der Vaart, R. Ni, J. Puckett, D. Kelley, N. Ouellette. “Three-dimensional time-resolved trajectories from laboratory insect swarms“.
Scientific Data, 6 (1), 1-8 (2019). Download - L. Zhao, K. Gustavsson, R. Ni, S. Kramel, G. Voth, H. Andersson, B. Mehlig. “Passive directors in turbulence“.
Physical Review Fluids, 4 (5), 054602 (2019). Download
2018
- A. K. Salibindla, R. Subedi, V. C. Shen, A. U. Masuk, and R. Ni. “Dissolution-driven convection in a heterogeneous porous medium“. Journal of Fluid Mechanics 857 (2018) Download
- V. Vohra, M. Wahba, G. Akarslan, R. Ni, and S. Brennan. “An examination of vehicle spacing to reduce aerodynamic drag in truck platoons“. 2018 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE. (2018) Download
2017
- J. Shen, R. Ni, “Experimental investigation of clogging dynamics in homogeneous porous medium”. Water Resources Research 53 1879–1890 (2017). Download
- T. T. Truscott, J. Belden, R. Ni, J. Pendlebury, B. McEwen, “Three-dimensional microscopic light field particle image velocimetry”. Experiments in Fluids 58 16 (2017). Download
2016
- Cole, B. C., Marcus, G. G., Parsa, S., Kramel, S., Ni, R., Voth, G. A., “Methods for Measuring the Orientation and Rotation Rate of 3D-printed Particles in Turbulence”. Journal of Visualized Experiments (2016).
- Gorbonos, D., Ianconescu, R., Puckett, J. G., Ni, R., Ouellette, N. T., Gov, N. S., “Long-range acoustic interactions in insect swarms: an adaptive gravity model”. New Journal of Physics 18 073042(2016).
- Ni, R., Ouellette, N. T., “On the tensile strength of insect swarms”. Physical Biology 13 045002 (2016).
- Venugopal, K., Kelly, P., Jamaluddin, A., McConnell, C., Alger, M., Morgan, E., Ni, R., Dunn, R., Grasselli, G., “The PetroChallenge–An Innovative E&P Learning Experience Using an Interactive Learning Simulation”. SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers. 2016.
- Zhou, Q., Huang, Y.-X., Lu, Z.-M., Liu, L., Ni, R., “Scale-to-scale energy and enstrophy transport in two-dimensional Rayleigh–Taylor turbulence”. Journal of Fluid Mechanics 786 294– 308 (2016).
2015
- Y.-C. Xie, S.-D. Huang, D. Funfschilling, X.-M. Li, R. Ni and K.-Q. Xia, “Effects of polymer additives in the bulk of turbulent thermal convection,” Journal of Fluid Mechanics 784 R3 (2015)
- R. Ni and N. T. Ouellette, “Velocity correlations in laboratory insect swarms,” Eur. Phys. J. Special Topics 224 3271–3277 (2015).
- R. Ni, M. H. Michalski, E. Brown, N. Doan, J. Zinter, N. T. Ouellette, and G. M. Shepherd, “Optimal directional volatile transport in retronasal olfaction,” Proc. Natl. Acad. Sci. USA 112 14700–14704 (2015).
- R. Ni, J. G. Puckett, E. R. Dufresne, and N. T. Ouellette, “Intrinsic fluctuations and driven response of insect swarms,” Phys. Rev. Lett. 115, 118104 (2015).
- J. G. Puckett, R. Ni, and N. T. Ouellette, “Time-frequency analysis reveals pairwise interactions in insect swarms,” Phys. Rev. Lett. 114, 258103 (2015).
- R. Ni, S. Kramel, N. T. Ouellette, and G. A. Voth, “Measurements of the coupling between the tumbling of rods and the velocity gradient tensor in turbulence,” J. Fluid Mech. 766, 202-225 (2015).
- R. Ni, S.-D. Huang, and K.-Q. Xia, “Reversals of the large-scale circulation in quasi-2D Rayleigh–Bénard convection,” J. Fluid Mech. 778, R5 (2015).
2014
- R. Ni, G. Voth, N. Ouellette. “Extracting turbulent spectral transfer from under-resolved velocity fields.”
Physics of Fluids, 26, 105107 (2014). - R. Ni, N. Ouellette, G. Voth. “Alignment of vorticity and rods with Lagrangian fluid stretching in turbulence.”
Journal of Fluid Mechanics, 743, R3 (2014). - G. Marcus, S. Parsa, S. Kramel, R. Ni, G. Voth. “Measurements of the solid-body rotation of anisotropic particles in 3D turbulence.”
New Journal of Physics. 16, 102001 (2014). - P. Wei, T. Chan, R. Ni, X. Zhao, K. Xia. “Heat transport properties of plates with smooth and rough surfaces in turbulent thermal convection.”
Journal of Fluid Mechanics, 740, 28-46 (2014). - S. Huang, M. Kaczorowski, R. Ni, K. Xia. “Confinement-induced heat-transport enhancement in turbulent thermal convection.”
Physical Review Letters, 16, 102001 (2014).
Selected as Recommendation in Theoretical and Applied Mechanics Letters.
2013
- R. Ni, K. Xia. “Experimental investigation of pair dispersion with small initial separation in convective turbulent flows.”
Physical Review E, 87, 6 (2013). - R. Ni, K. Xia. “On the Kolmogorov Constants for the Second-Order Structure Function and the Energy Spectrum.”
Physical Review E, 87, 2 (2013).
Before 2012
- P. Wei, R. Ni and K.-Q. Xia, “Enhanced and Reduced Heat Transport in Turbulent Thermal Convection with Polymer Additives,” Phys. Rev. E 86, 1 (2012).
- R. Ni, S.-D. Huang and K.-Q. Xia, “Lagrangian acceleration measurements in convective thermal turbulence,” J. Fluid Mech. 692, 395 (2012).
- R. Ni, S.-D. Huang and K.-Q. Xia, “Local energy dissipation rate balances local heat flux in the center of turbulent thermal convection,” Phys. Rev. Lett. 107, 174503 (2011).
- R. Ni, S.-Q. Zhou, K.-Q. Xia, “An experimental investigation of turbulent thermal convection in water-based alumina nanofluid,” Phy. Fluids 23, 022005 (2011).
- D. C. Venerus, J. Buongiorno, R. Christianson, et al. R. Ni, “Viscosity measurements on colloidal dispersions (nanofluids) for heat transfer applications,” Appl. Rheol. 20, 4, 44582 (2010)
- K. Sugiyama, R. Ni, R. J. A. M. Stevens, T. S. Chan, S.-Q. Zhou, H.-D. Xi, C. Sun, S. Grossmann, K.-Q. Xia and D. Lohse, “Flow reversals in thermally driven turbulence,” Phys. Rev. Lett. 105, 034503 (2010).
- S.-Q. Zhou, R. Ni and D. Funfschilling, “Effects of shear rate and temperature on viscosity of alumina polyalphaolefins nanofluids,” J. Appl. Phys. 107, 054317 (2010).
- J. Buongiorno, D. C. Venerus et al. (R. Ni), “A benchmark study on the thermal conductivity of nanofluids,” J. Appl. Phys. 106, 094312 (2009).
- S.-Q. Zhou and R. Ni, “Measurement of the specific heat capacity of water-based Al2O3 nanofluid,” Appl. Phys. Lett. 92, 093123 (2008).This paper was selected for the March 24, 2008 issue of Virtual Journal of Nanoscale Science & Technology.