Hierarchical branched structures exist in nature in diverse forms, functions and scales stretching from micro to very large sizes. Typically effective as heat and mass transfer networks, ordered hierarchal/ multiscale branched/ tree-like networks could be fabricated by controlling a fluid reshaping process in a device called ‘Multiport Hele-Shaw cell’. Control over the instability by employing micro-modified cell plates, containing ‘source-holes’ as ports, rearranges the fluid into ordered tree-like networks. Reshaping is an outcome of ‘Saffman-Taylor interface instability’ induced by the displacement of a high-viscous fluid by a relatively low-viscous one in the cell. A new configuration of ‘source-holes’, is proposed here to control the instability towards shaping of high-viscous fluid into ordered multiscale treelike layouts. The process is lithography-less method of shaping the fluid spontaneously into 3D layouts in a very short interval of time. Fabricated structures are UV-cured and cast into channel-networks in an elastomer PDMS.
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ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels
June 10–13, 2018
Dubrovnik, Croatia
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5119-7
PROCEEDINGS PAPER
Controlling Interfacial Flow Instability via Micro Engineered Surfaces Towards Multiscale Channel Fabrication
Tanveer ul Islam,
Tanveer ul Islam
Indian Institute of Technology, Bombay, Mumbai, India
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Prasanna S. Gandhi
Prasanna S. Gandhi
Indian Institute of Technology, Bombay, Mumbai, India
Search for other works by this author on:
Tanveer ul Islam
Indian Institute of Technology, Bombay, Mumbai, India
Prasanna S. Gandhi
Indian Institute of Technology, Bombay, Mumbai, India
Paper No:
ICNMM2018-7668, V001T06A005; 7 pages
Published Online:
August 23, 2018
Citation
Islam, TU, & Gandhi, PS. "Controlling Interfacial Flow Instability via Micro Engineered Surfaces Towards Multiscale Channel Fabrication." Proceedings of the ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels. Dubrovnik, Croatia. June 10–13, 2018. V001T06A005. ASME. https://doi.org/10.1115/ICNMM2018-7668
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