![Cavitation Microfluidics
Cavitation on hydrofoil [1] Microfluidic chip [2]](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-2-320.jpg)
![Cavitation Chemistry & Other Effects
Luminescence [5]
Single bubble collapse near
the wall [4]
2 2
獅
獅
2
Energy
Mechanical, heat and
chemical effects
Applications](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-4-320.jpg)
![Luminescence [5]
Single bubble collapse near
the wall [4]
Cavitation Chemistry & Other Effects
2 2
獅
獅
2
Energy
Mechanical, heat and
chemical effects
Applications](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-5-320.jpg)
![Luminescence [5]
Single bubble collapse near
the wall [4]
2 2
獅
獅
2
Energy
Cavitation Chemistry & Other Effects
Mechanical, heat and
chemical effects
Applications](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-6-320.jpg)
![Microscale Cavitation
Bubbles completely filling
microchannel [6]
Cases relevant for
comparison [6], ~
inception, 金 ~ choking
=
倹
1
2
ｐ
2
Device
Description
[] []
ゐ = 11.5
0.284 0.242 = 100.2
= 101.3
ゐ = 21.5
0.38 0.299 = 100.2
= 101.3
ゐ = 21.5
0.24 0.171 = 201
= 101.3
ゐ = 40
0.301 0.252 = 200.2
= 101.3](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-7-320.jpg)
![Microchannel
=
Case
No.
倹
[]
[]
#1 102.5 0.365
#2 130 0.415
#3 158 0.465
#4 186.5 0.515
#5 213 0.565
#6 241 0.615
Dimensions of microchannel, given in micrometers.
BCs locations and types are indicated
Overview of
solved cases](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-8-320.jpg)
![Stable liquid jet surrounded by two
broad and long vapor bubbles that
touch the walls [7]
Wavy pattern of cavity
boundary [6]
= 0.365
Microchannel](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-10-320.jpg)
![Millichannel
Millichannel
geometry
and BCs, all
dimensions
in
micrometers
Case
No.
[ ]
[]
#1 14 5.67
#2 20 2.95
#3 60 0.53
Overview of solved cases](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-12-320.jpg)
![Pressure drop
Temperature of bubble
collapse
Source: [8]
Millichannel](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-14-320.jpg)
![Sources of Images
[1] FRANC, Jean-Pierre a Jean-Marie MICHEL. Fundamentals of cavitation. Dordrecht: Springer
Netherlands, 2005, xxii, 300 p. ISBN 978-904-8166-183.
[2] news.stanford.edu/news/2006/january18/gifs/fluidicschip.jpg
[3] GOGATE, Parag, Irfan SHIRGAONKAR, M. SIVAKUMAR, P. SENTHILKUMAR, Nilesh VICHARE
and Aniruddha PANDIT Cavitation reactors: Efficiency assessment using a model reaction. AIChE
Journal [online]. Hoboken: Wiley Subscription Services, Inc., A Wiley Company, 2001, 47(11), 2526-
2538 [cit. 2015-12-19]. DOI: 10.1002/aic.690471115. ISSN 00011541.
[4] brookbubble.weebly.com/uploads/7/8/1/6/78160850/5575735.gif
[5] DUPLAT, J辿r担me a Emmanuel VILLERMAUX. Luminescence from Collapsing Centimeter Bubbles
Expanded by Chemical Reaction. Physical review letters [online]. 2015, 115(9), 094501 [cit. 2016-06-
06].
[6] MISHRA, C. a Y. PELES Size scale effects on cavitating flows through microorifices entrenched in
rectangular microchannels. Microelectromechanical Systems, Journal of [online]. USA: IEEE, 2005,
14(5), 987-999 [cit. 2015-12-19]. DOI: 10.1109/JMEMS.2005.851800. ISSN 10577157.
[7] MISHRA, Chandan a Yoav PELES. Flow visualization of cavitating flows through a rectangular slot
micro-orifice ingrained in a microchannel. Physics of Fluids [online]. AIP, 2005, 17(11), 13602-13616
[cit. 2016-04-10]. DOI: 10.1063/1.2132289. ISSN 10706631.
[8] ROOZE, Joost, Matthieu ANDR, Gert-Jan GULIK, David FERNNDEZ-RIVAS, Johannes
GARDENIERS, Evgeny REBROV, Jaap SCHOUTEN a Jos KEURENTJES. Hydrodynamic cavitation
in microchannels with channel sizes of 100 and 750 micrometers. Microfluidics and Nanofluidics
[online]. Berlin/Heidelberg: Springer-Verlag, 2012, 12(1), 499-508 [cit. 2015-12-19]. DOI:
10.1007/s10404-011-0891-5. ISSN 16134982.](https://image.slidesharecdn.com/714e90a2-1fd4-49a4-99d1-28c1bf8a24e7-160717140420/85/Cavitation-in-Microfliuidcs_rev1_43_share-18-320.jpg)
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- 1. Cavitation in Microfluidics Kavitace v mikrofluidice Academic Year: 2015 / 2016 Martin HOLUB Supervisor: doc. Ing. Pavel RUDOLF, Ph.D. Time is the most valuable thing a man can spend. Theophrastus (370285 BC)
- 2. Cavitation Microfluidics Cavitation on hydrofoil [1] Microfluidic chip [2]
- 3. Thesis Goals Introduction, definition of fundamental terms Literature research and report on the state-of-the- art technology CFD for the flow in micrometer-sized channel Design of experiment
- 4. Cavitation Chemistry & Other Effects Luminescence [5] Single bubble collapse near the wall [4] 2 2 獅 獅 2 Energy Mechanical, heat and chemical effects Applications
- 5. Luminescence [5] Single bubble collapse near the wall [4] Cavitation Chemistry & Other Effects 2 2 獅 獅 2 Energy Mechanical, heat and chemical effects Applications
- 6. Luminescence [5] Single bubble collapse near the wall [4] 2 2 獅 獅 2 Energy Cavitation Chemistry & Other Effects Mechanical, heat and chemical effects Applications
- 7. Microscale Cavitation Bubbles completely filling microchannel [6] Cases relevant for comparison [6], ~ inception, 金 ~ choking = 倹 1 2 ｐ 2 Device Description [] [] ゐ = 11.5 0.284 0.242 = 100.2 = 101.3 ゐ = 21.5 0.38 0.299 = 100.2 = 101.3 ゐ = 21.5 0.24 0.171 = 201 = 101.3 ゐ = 40 0.301 0.252 = 200.2 = 101.3
- 8. Microchannel = Case No. 倹 [] [] #1 102.5 0.365 #2 130 0.415 #3 158 0.465 #4 186.5 0.515 #5 213 0.565 #6 241 0.615 Dimensions of microchannel, given in micrometers. BCs locations and types are indicated Overview of solved cases
- 9. Solution Monitor Vapor Fraction Fast Fourier Transform Microchannel
- 10. Stable liquid jet surrounded by two broad and long vapor bubbles that touch the walls [7] Wavy pattern of cavity boundary [6] = 0.365 Microchannel
- 11. Vapor Volume Fraction Frequency Microchannel
- 12. Millichannel Millichannel geometry and BCs, all dimensions in micrometers Case No. [ ] [] #1 14 5.67 #2 20 2.95 #3 60 0.53 Overview of solved cases
- 13. Vapor fraction = 0.2 in brick- shaped chamber = 0.53 Vapor fraction in constriction, high void fraction in red Millichannel
- 14. Pressure drop Temperature of bubble collapse Source: [8] Millichannel
- 15. Design of Experiment Microfluidic channel with packaging module (Courtesy of D. Jasikova TUL)
- 16. Schematics of experimental setup Design of Experiment
- 17. Main Outcomes Recommendations for future research work Periodicity of solution Strengths and weaknesses of laminar model Design of experimental setup and procedure with 亮-PIV Phases distribution Regions of recirculation and potential mixing Overview of state-of-the-art research CFD guidelines for future students
- 18. Sources of Images [1] FRANC, Jean-Pierre a Jean-Marie MICHEL. Fundamentals of cavitation. Dordrecht: Springer Netherlands, 2005, xxii, 300 p. ISBN 978-904-8166-183. [2] news.stanford.edu/news/2006/january18/gifs/fluidicschip.jpg [3] GOGATE, Parag, Irfan SHIRGAONKAR, M. SIVAKUMAR, P. SENTHILKUMAR, Nilesh VICHARE and Aniruddha PANDIT Cavitation reactors: Efficiency assessment using a model reaction. AIChE Journal [online]. Hoboken: Wiley Subscription Services, Inc., A Wiley Company, 2001, 47(11), 2526- 2538 [cit. 2015-12-19]. DOI: 10.1002/aic.690471115. ISSN 00011541. [4] brookbubble.weebly.com/uploads/7/8/1/6/78160850/5575735.gif [5] DUPLAT, J辿r担me a Emmanuel VILLERMAUX. Luminescence from Collapsing Centimeter Bubbles Expanded by Chemical Reaction. Physical review letters [online]. 2015, 115(9), 094501 [cit. 2016-06- 06]. [6] MISHRA, C. a Y. PELES Size scale effects on cavitating flows through microorifices entrenched in rectangular microchannels. Microelectromechanical Systems, Journal of [online]. USA: IEEE, 2005, 14(5), 987-999 [cit. 2015-12-19]. DOI: 10.1109/JMEMS.2005.851800. ISSN 10577157. [7] MISHRA, Chandan a Yoav PELES. Flow visualization of cavitating flows through a rectangular slot micro-orifice ingrained in a microchannel. Physics of Fluids [online]. AIP, 2005, 17(11), 13602-13616 [cit. 2016-04-10]. DOI: 10.1063/1.2132289. ISSN 10706631. [8] ROOZE, Joost, Matthieu ANDR, Gert-Jan GULIK, David FERNNDEZ-RIVAS, Johannes GARDENIERS, Evgeny REBROV, Jaap SCHOUTEN a Jos KEURENTJES. Hydrodynamic cavitation in microchannels with channel sizes of 100 and 750 micrometers. Microfluidics and Nanofluidics [online]. Berlin/Heidelberg: Springer-Verlag, 2012, 12(1), 499-508 [cit. 2015-12-19]. DOI: 10.1007/s10404-011-0891-5. ISSN 16134982.