Path: Top -> Journal -> Telkomnika -> 2013 -> Vol 11, No 4: December
Two-phase Flow Visualization Employing Gauss-Newton Method in Microchannel
Two-phase Flow Visualization Employing Gauss-Newton Method in Microchannel
Journal from gdlhub / 2016-11-09 02:45:13Oleh : Yonghong Liu, Mingyan Zu, Xiantao Wang, Je-Eun Choi, Telkomnika
Dibuat : 2013-12-01, dengan 1 file
Keyword : microchannel, Agilent instrument, spatial resolution, Adaptive thresholding
Url : http://journal.uad.ac.id/index.php/TELKOMNIKA/article/view/1185
Monitoring perilaku aliran pada skala mikro sangat penting dalambanyak proses industri dan biokimia. Tomography resistansi listrik (ERT), sebagaiteknik alternatif untuk memvisualisasikan alira multi-fase, memiliki resolusi temporal yang tinggi untuk memantau proses transien cepat. Namun,kompleksitas fabrikasi kanal-mikro karena kesulitan pengambilan sampel data listrik dan non-linearitas dan ill-posedness dari masalah inversi yang sering menyebabkan resolusi spasial yang buruk pada gambar terekonstruksi. Pada makalah ini, perangkat keras akuisisi data berbasis Agilent disiapkan untuk pengambilan data yang handal pada microchannel baru. Metode Gauss-Newton dengan teknik ambang adaptif (GNAT) disajikan untuk meningkatkan resolusi spasial gambar ERT. Hasil awal eksperimen menunjukkan bahwa sistem ERT berdasarkan unit akuisisi data Agilent dan metode GNAT dapat secara efektif memvisualisasikan aliran dua-fasa padat-cair dalam kanal-mikro.
Deskripsi Alternatif :Flow behaviour monitoring on the micro-scale is very important in many industrial and biochemical process. Electrical resistance tomography (ERT), as an alternative technique to visualize multi-phase flows, has high temporal resolution for monitoring fast transient processes. However, the complexity of microchannel fabrication end up with the difficulty of electrical data sampling and the non-linearity and ill-posedness of the inverse problem often cause the poor spatial resolution of the reconstructed images. Inthis paper, Agilent based data acquisition hardware was set up for reliable data retrieval from a novel microchannel. Gauss-Newton method with adaptive threshold (GNAT) technique was presented to improve the spatial resolution of ERT images.Preliminary experimental results reveal that ERT system based on Agilent data acquisition unit and GNAT method can effectively visualize the solid-liquid two-phase flow in microchannel.
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