Fabrication of polydimethylsiloxane (PDMS) pulsating heat pipe

Lin, Yih‐Hwang; Kang, Shung‐Wen; Wu, Tsung-yu

doi:10.1016/j.applthermaleng.2008.03.028

Cited by 99 publications

(44 citation statements)

References 11 publications

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“…Recently, Borgmeyer and Ma [8] fabricated a PHP with the size of 76.2 mm×76.2 mm in a flat plate copper, the square crosssection channels in the PHP had a dimension of 1.5785 mm× 1.5875 mm. Most recently, a smaller pulsating heat pipe with length, width, and internal diameter of 56, 50 and 2 mm, respectively has been manufactured using polydimethylsiloxane (PDMS) by Lin et al [9] Though the work conducted by Borgmeyer and Ma [8] and Lin et al [9] significantly reduced the size of the pulsating heat pipe, the channel dimensions of their plate PHPs were still on the magnitude of millimeters, which put them into the miniature rather than micro heat pipe category.…”

Section: Introductionmentioning

confidence: 99%

Flow visualization of silicon-based micro pulsating heat pipes

2010

Sci. China Technol. Sci.

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Two sets of silicon-based micro pulsating heat pipes (SMPHPs) with trapezoidal cross section having hydraulic diameters of 352 μm (#1) and 394 μm (#2) respectively were fabricated for the first time using MEMS technology. With FC-72 as the working fluid, the start-up, steady operation state, as well as flow patterns were investigated using a CCD camera. It was found that the start-up process of these two SMPHPs was rather rapid. At the start-up period, no nucleation was observed, and the vapor plugs at the evaporator U-bends were formed mainly due to the breakup of liquid slugs. At the steady operation state, self-sustained oscillation with large amplitudes dominated the flow behavior when the inclination angle varied from 10° to 90°, but the nucleate boiling and bulk circulation were observed only in SMPHP #2. While bubbly, slug/plug, annular/semi-annular, and wavy-annular flows were observed in both two SMPHPs, the injection flow only appeared in SMPHP #2. micro pulsating heat pipe, flow visualization, start-up, flow pattern, injection flow Citation: Qu J, Wu H Y. Flow visualization of Silicon-based micro pulsating heat pipes. Sci China Tech Sci, 2010, 53: 984−990,

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Section: Introductionmentioning

confidence: 99%

Flow visualization of silicon-based micro pulsating heat pipes

2010

Sci. China Technol. Sci.

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“…The formation of segmented slugs in a capillary tube is attributed to the balance of gravity and surface tension forces and leads to the defining of its Bond number. PHPs are suggested to operate with a Bond number within the following range [22]:…”

Section: Resultsmentioning

confidence: 99%

Micro pulsating heat pipes with alternate microchannel widths

Yang

Cheng

Liu

et al. 2015

Applied Thermal Engineering

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“…Load-displacement curve was recorded to calculate the elastic modulus of the PDMS membrane. Results showed that the relationship between the applied tensile load and resultant strain was linear, and the elastic modulus was calculated to be 1.34± 0.21 MPa, which corresponds well with the previous work (Lin et al 2009). …”

Section: Simulation and Experimental Verification Of Tensile Strain Omentioning

confidence: 88%

Development of high-throughput perfusion-based microbioreactor platform capable of providing tunable dynamic tensile loading to cells and its application for the study of bovine articular chondrocytes

Wang

Liu

et al. 2011

Biomed Microdevices

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Mammalian cells are sensitive to extracellular microenvironments. In order to precisely explore the physiological responses of cells to tensile loading, a stable and well-defined culture condition is required. In this study, a high-throughput perfusion-based microbioreactor platform capable of providing dynamic equibiaxial tensile loading to the cultured cells under a steady culture condition was proposed. The mechanism of generating tensile stimulation to cells is based on the pneumatically-driven deformation of an elastic polydimethylsiloxan (PDMS) membrane which exerts tensile loading to the attached cells. By modulating the magnitude and frequency of the applied pneumatic pressure, various tensile loading can be generated in a controllable manner. In this study, the microbioreactor platform was designed with the aid of the experimentally-validated finite element (FE) analysis to ensure the loading of tensile strain to cells is uniform and definable. Based on this design, the quantitative relationship between the applied pneumatic pressure and the generated tensile strain on the PDMS membrane was established via FE analysis. Results demonstrated that the proposed device was able to generate the tensile strain range (0~0.12), which covers the physiological condition that articular chondrocytes experience tensile strain under human walking condition. In this study, moreover, the effect of tensile loading on the metabolic, biosynthetic and proliferation activities of articular chondrocytes was investigated. Results disclosed that the dynamic tensile loading of 0.12 strain at 1 Hz might significantly up-regulate the synthesis of glycosaminoglycans while such stimulation was found no significant influence on the metabolic activity, the synthesis of collagen, and the proliferation of chondrocytes. Overall, this study has presented a high throughput perfusion micro cell culture device that is suitable for precisely exploring the effect of tensile loading on cell physiology.

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Fabrication of polydimethylsiloxane (PDMS) pulsating heat pipe

Cited by 99 publications

References 11 publications

Flow visualization of silicon-based micro pulsating heat pipes

Flow visualization of silicon-based micro pulsating heat pipes

Micro pulsating heat pipes with alternate microchannel widths

Development of high-throughput perfusion-based microbioreactor platform capable of providing tunable dynamic tensile loading to cells and its application for the study of bovine articular chondrocytes

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