PHOTOGRAPHIC STUDY ON THE ONSET OF SIGNIFICANT VOID IN WATER SUBCOOLED FLOW BOILING AT LOW PRESSURE
Published In: 3RD INTERNATIONAL E-CONFERENCE ON ENGINEERING, TECHNOLOGY AND MANAGEMENT
Author(s): HIDEKI TAKAHASHI , HONGJI LI , TOMIO OKAWA , YUYA ENDO
Abstract: Visualization of bubble's dynamics in vertical upward subcooled flow boiling was carried out to investigate the mechanisms causing the onset of significant void (OSV). It was found that formation of large bubbles is a key phenomenon since they were large in size as well as their lifetime was remarkably longer than those of the smaller bubbles. Most bubbles were detached from the heated surface to disappear immediately after nucleation or during rise along the vertical heated surface. Therefore, for the large bubbles to be formed, it was necessary to coalesce with other bubbles during the growth period at the nucleation site and the rising period along the heated surface. However, when the bubble size exceeded the critical value, the bubbles rose along the heated surface stably. Thus, the bubble lifetime was elongated substantially to contribute to the rapid increase of the void fraction.
- Publication Date: 27-Sep-2020
- DOI: 10.15224/978-1-63248-190-0-05
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THE IMPACT OF UNEMPLOYMENT ON HOUSING PRICE INDEX: EVIDENCE FROM SAUDI ARABIA: A VAR APPROACH
Published In: 3RD INTERNATIONAL E-CONFERENCE ON ENGINEERING, TECHNOLOGY AND MANAGEMENT
Author(s): DIRAR ELMAHI ELOBAID AHMED
Abstract: The causality link between house prices and the rate of unemployment presents an attractive area for research as the two variables are key macroeconomic indicators for any economy. This paper intends to investigate how the house price index (HPI) is varying under the impact of Unemployment (UNEMP) in Saudi Arabia. Quarterly secondary data for a period of six years extending from 2014Q1 – 2019Q4 was compiled from the publications of Saudi Arabian Monetary Agency (SAMA). The paper employs the VAR model. Granger causality tests, variance decomposition, and impulse response functions are also used. The results reveal that UNEMP has an insignificant negative relationship on housing prices in KSA. Results also reveals a two-way Granger causality between (UNEMP) and (HPI). Variance decomposition exhibits that (UNEMP) is taking a low explanatory power over the variations of house price index both in the short and long run. The results have deep implications for future studies of other macroe
- Publication Date: 27-Sep-2020
- DOI: 10.15224/978-1-63248-190-0-06
- Views: 0
- Downloads: 0