doc. Ing. Zdeněk Trávníček, CSc.

Research area

• Experimental fluid mechanics and heat/mass transfer.
• Passive/active control of thermal/flow fields. Forced convective heat/mass transfer enhancement.
• Impinging, pulsatile, and synthetic jets; wakes.

Education and Appointments

2014              Associate Professor "Non-isothermal wakes and impinging jets"
2008-2023   Deputy Head of Department of Thermodynamics
since 2004   Head of Laboratory of Heat and Mass Transfer
since 1996   Institute of Thermomechanics, CAS
1994              CSc.-degree (equivalent to Ph.D.) "Coanda effect used for impinging drying"
1985-1995   SVÚSS Prague-Běchovice (National Research Institute for Machine Design) as research assistant,
then researcher, finally the head of Laboratory of Impingement Drying
1985             Ing. (equivalent to M.Sc.), Czech Technical University (CTU) in Prague, Faculty of Mechanical Engineering

Stays abroad
2000–2001 Johns Hopkins University, Baltimore, USA (5 months)
1998–1999 and 2002–2003 National Taiwan University, Institute of Applied Mechanics, Taiwan R.O.C. (2 years)
1990             ITTF, Institute of Technical Thermophysics, National Academy of Sciences of Ukraine, Kiev, Ukraine
(2 months with Prof. E.P. Dyban)

Publications
More than 290 papers in various journals and conference proceedings, 58 of them are in "impacted journals";
45 research reports, and 10 Patent Certificates granted from USA (2), Taiwan R.O.C. (2) and CR (6).

Citations

More than 600 citations recorded by ISI Web of Knowledge (without self-citations).

Selected publications

Representative journal papers

• Z. Antošová, Z. Trávníček, Stagnation point heat transfer to an axisymmetric impinging jet at transition to turbulence. J. Heat Transfer -Trans. ASME 145 (2023) 023902-1–023902-10.
• Z. Trávníček, Z. Antošová, Impingement heat transfer to the synthetic jet issuing from a nozzle with an oscillating cross section. Int. J. Therm. Sci. 153 (2020) 106349.
• Z. Trávníček, Z. Broučková, Characterization of impingement heat/mass transfer to the synthetic jet generated by a biomimetics actuator. J. Heat Transf. Trans. ASME 141 (2019) 042203-1–042203-9.
• J. Kordík, Z. Trávníček, Integral quantities of axisymmetric synthetic jets evaluated from a direct jet thrust measurement. Flow Turbul. Combust. 103 (3) (2019) 827–844.
• Z. Trávníček, Z. Broučková, A synthetic jet issuing from a bio-inspired actuator with an oscillating nozzle lip. J. Fluids Eng. Trans. ASME 140 (2018) 101104-1 – 101104-5.
• J. Kordík, Z. Trávníček, Optimal diameter of nozzles of synthetic jet actuators based on electrodynamic transducers. Exp. Therm. Fluid Sci. 86 (2017) 281–294.
• J. Kordík, Z. Trávníček, V.Timchenko, N.A. Ismail, The predominant effect of stroke length on velocity profiles at the exit of axisymmetric synthetic jet actuators. Int. J. Heat Fluid Flow 66 (2017) 197–208.
• Z. Trávníček, Z. Broučková, J. Kordík, T.Vít, Visualization of synthetic jet formation in air. J. Visual. 18 (2015) 595–609.
• Z. Trávníček, T. Vít, Impingement heat/mass transfer to hybrid synthetic jets and other reversible pulsating jets. Int. J. Heat Mass Tran. 85 (2015) 473–487.
• Z. Trávníček, A.–B. Wang, W.–Y. Tu, Laminar vortex shedding behind a cooled circular cylinder. Exp. Fluids 55 (2014), 1679.
• Z. Trávníček, Z. Broučková, J. Kordík, Formation criterion for synthetic jets at high Stokes numbers. AIAA J. 50 (2012) 2012–2017.
• Z. Trávníček, L. Němcová, J. Kordík, V. Tesař, V. Kopecký, Axisymmetric impinging jet excited by a synthetic jet system. Int. J. Heat Mass Tran. 55 (2012) 1279–1290.

Refereed papers in recent conference proceedings

• Z. Trávníček, Z. Antošová, Synthetic jet actuators with rigid and temporally variable nozzles. In: 10th International symposium on Turbulence, Heat and Mass transfer, THMT-23, Rome, Sept. 11–15, 2023, pp. 171–174.
• Z. Trávníček, Z. Broučková, Experimental study of a biomimetic synthetic jet actuator. In: 12th European Fluid Mechanics Conference, Vienna, Austria, EFMC12, Sept. 9–13, 2018.

Patents

• Z. Trávníček, Z. Broučková, Způsob a zařízení pro generování syntetizovaného nebo hybridního syntetizovaného proudu tekutiny. Patent 309433, Nov. 30, 2022.
• Z. Trávníček, Z. Broučková, Method and device for cooling of cylinder-shaped bodies by a cooling fluid jet. Patent No. 306506, Jan. 4, 2017.
• A.-B. Wang, Z. Trávníček, Y.-H. Wang, M.-C. Hsu, Double-acting device for generating of synthetic jets. US Patent, No. US 7527086 B2, May 5, 2009.
• A-.B. Wang, Z. Trávníček, Y.-H. Wang, M.-C. Hsu, Double-acting device for generating of synthetic jets. Patent Certificate of Taiwan R.O.C. No. I 267 616, 2006/12/01, valid period 2006–2024.
• A.-B.Wang, Z.Trávníček, C.-H.Lee, Y.-H.Wang, M.-C.Hsu, C.-K.Lee, A.I.Fedorchenko, Micromixer apparatus and method therefor. Patent Certificate of Taiwan R.O.C. No. I 249 431, 2006/02/21, valid period 2006–2025.

Teaching

Supervisor of Ph.D. and M.Sc. students.

Grants