Nucleate boiling within an angular geometry, formed by a horizontal heated wall and an inclined wall attachment making a line contact, was investigated. This is a basic geometry found in many structured boiling heat transfer surfaces. Pool boiling tests were conducted using water at atmospheric pressure. It was found that nucleate boiling from the horizontal heated wall is greatly enhanced by a favorable thermal environment within the angular geometry between the two walls. The roughness effect was confirmed by an analysis of bubble sliding movement on a wall under the balance of surface tension, buoyancy, and drag force. The results reveal the importance of the angular geometry to the enhanced nucleate boiling heat transfer of structured surfaces, and provide information for the development of more effective surfaces.
|Number of pages||8|
|Journal||American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD|
|State||Published - 1989|
|Event||Multiphase Flow, Heat and Mass Transfer - Presented at the 1989 National Heat Transfer Conference - Philadelphia, PA, USA|
Duration: Aug 6 1989 → Aug 9 1989