The effect of the liquid physical properties on the wave frequency and wave velocity of co-current gas-liquid stratifed two-phase flow in a horizontal pipe
Penulis/Author
SETYA WIJAYANTA (1); Prof. Dr. Eng. Ir. Deendarlianto, S.T., M.Eng. (2); Prof. Dr. Ir. Indarto, DEA., IPM., ASEAN Eng. (3); ARI PRASETYO (4); Akhmad Zidni Hudaya (5)
Tanggal/Date
2023
Kata Kunci/Keyword
Abstrak/Abstract
The aim of the present study was to investigate the effect of the liquid physical properties on the liquid flm
thickness, wave frequency, and wave velocity in co-current gas-liquid stratifed two-phase fow in a horizontal
pipe. The present experimental study was conducted using an acrylic pipe with an inner diameter of 26 mm and a
length of 9500 mm. The superfcial velocity of liquid (JL) and gas (JG) were 0.02 m/s to 0.1 m/s and 4 m/s to 16
m/s, respectively. A highspeed video camera was used to take the visual data which is then processed by the
developed image processing techniques to obtain the time series data of the liquid flm thickness. The probability
distribution function (PDF) and discrete wavelet transform (DWT) were used to analyze the time series of the
liquid flm thickness. In addition, the data were also analyzed using the power spectral density (PSD) in order to
obtain the wave frequency and the wave velocity. Next, the experimental correlations to predict the wave frequency and the wave velocity were developed using the dimensional analysis. From the time series of the liquid
flm thickness, the effect of the viscosity and surface tension on the shifting of scale and frequency of the wavelet
decomposition level, as well as the frequency and velocity of the waves were clarifed. In addition, a correlation
to predict the frequency and velocity of waves has been successfully developed, in which the Martinelli
parameter, the ratio of gas and liquid Reynold numbers, and the Weber number play the important roles in the
correlation
