PMID- 28773958
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201001
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 9
IP  - 10
DP  - 2016 Oct 15
TI  - Physical Properties of PDMS (Polydimethylsiloxane) Microfluidic Devices on Fluid 
      Behaviors: Various Diameters and Shapes of Periodically-Embedded Microstructures.
LID - 10.3390/ma9100836 [doi]
LID - 836
AB  - Deformable polydimethylsiloxane (PDMS) microfluidic devices embedded with three 
      differently-shaped obstacles (hexagon, square, and triangle) were used to examine 
      the significant challenge to classical fluid dynamics. The significant factors in 
      determining a quasi-steady state value of flow velocity (v)(QS) and pressure drop 
      per unit length (∆P/∆x)(QS) were dependent on the characteristic of embedded 
      microstructures as well as the applied flow rates. The deviation from the 
      theoretical considerations due to PDMS bulging investigated by the friction 
      constant and the normalized friction factor revealed that the largest PDMS 
      bulging observed in hexagonal obstacles had the smallest (∆P/∆x)(QS) ratios, 
      whereas triangle obstacles exhibited the smallest PDMS bulging, but recorded the 
      largest (∆P/∆x)(QS) ratios. However, the influence of (v)(QS) ratio on 
      microstructures was not very significant in this study. The results were close to 
      the predicted values even though some discrepancy may be due to the relatively 
      mean bulging and experimental uncertainty. The influence of deformable PDMS 
      microfluidic channels with various shapes of embedded microstructures was 
      compared with the rigid microchannels. The significant deviation from the 
      classical relation (i.e., f~1/Re) was also observed in hexagonal obstacles and 
      strongly dependent on the channel geometry, the degree of PDMS deformation, and 
      the shapes of the embedded microstructures.
FAU - Roh, Changhyun
AU  - Roh C
AD  - Biotechnology Research Division, Advanced Radiation Technology Institute (ARTI), 
      Korea Atomic Energy Research Institute (KAERI), 29 Geumgu-gil, Jeongeup, Jeonbuk 
      56212, Korea. chroh@kaeri.re.kr.
FAU - Lee, Jaewoong
AU  - Lee J
AD  - Department of Textile Engineering and Technology, Yeungnam University, 280 
      Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Korea. jaewlee@yu.ac.kr.
FAU - Kang, ChanKyu
AU  - Kang C
AD  - Ministry of Employment and Labor, Major Industrial Accident Prevention Center, 34 
      Yeosusandallo, Yeosu-Si, Jeonnam 59631, Korea. chemnet75@korea.kr.
LA  - eng
PT  - Journal Article
DEP - 20161015
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC5456639
OTO - NOTNLM
OT  - PDMS bulging
OT  - embedded microstructures
OT  - friction factor
OT  - hydraulic diameter
OT  - pressure drop
COIS- The authors declare no conflict of interest.
EDAT- 2017/08/05 06:00
MHDA- 2017/08/05 06:01
PMCR- 2016/10/15
CRDT- 2017/08/05 06:00
PHST- 2016/08/17 00:00 [received]
PHST- 2016/09/29 00:00 [revised]
PHST- 2016/10/11 00:00 [accepted]
PHST- 2017/08/05 06:00 [entrez]
PHST- 2017/08/05 06:00 [pubmed]
PHST- 2017/08/05 06:01 [medline]
PHST- 2016/10/15 00:00 [pmc-release]
AID - ma9100836 [pii]
AID - materials-09-00836 [pii]
AID - 10.3390/ma9100836 [doi]
PST - epublish
SO  - Materials (Basel). 2016 Oct 15;9(10):836. doi: 10.3390/ma9100836.