ROUGHNESS EFFECTS ON NUCLEATE POOL BOILING OF WATER ON HORIZONTAL STAINLESS STEEL CYLINDER

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AKBARI AMIR; Alavifazel Seyed Ali

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Seminar Paper

Paper Information

Seminar: INTERNATIONAL CONFERENCE ON RESEARCH IN SCIENCE AND TECHNOLOGY
Year:2016 | Issue:2

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Title

ROUGHNESS EFFECTS ON NUCLEATE POOL BOILING OF WATER ON HORIZONTAL STAINLESS STEEL CYLINDER

Author(s)

AKBARI AMIR | Alavifazel Seyed Ali

Keywords

NUCLEATE POOL BOILING

HORIZONTAL CYLINDER

WATER

SURFACE ROUGHNESS

Abstract

NUCLEATE BOILING HEAT TRANSFER (NBHT) HAS BEEN CONSIDERED AN EFFECTIVE WAY TO REMOVE THE HIGHER HEAT FLUX AT A GIVEN TEMPERATURE DIFFERENCE COMPARED WITH A SINGLE PHASE HEAT TRANSFER.THE PRESENT STUDY IS AN EXPERIMENTAL INVESTIGATION OF ROUGHNESS EFFECTS ON NUCLEATE POOL BOILING OF WATER ON HORIZONTAL STAINLESS STEEL CYLINDER. THE CYLINDERS WERE TREATED BY DIFFERENT SAND PAPER GRIT SIZES TO ACHIEVE DIFFERENT SURFACE ROUGHNESS. THE AVERAGE SURFACE ROUGHNESS OF THE SEX SAMPLES WAS 0.98, 0.81, 0.65, 0.48, 0.24 AND 0.08 MM, RESPECTIVELY. THE EXPERIMENTS WERE PERFORMED IN THE HEAT FLUX RANGE OF 5 TO 110 KWM-2. THE HEAT TRANSFER COEFFICIENT WAS CALCULATED BY MEASURING WALL SUPERHEAT OF THE SAMPLES AND THE INPUT HEAT FLUX. THE RESULTS SHOW SIGNIFICANT IMPROVEMENT OF HEAT TRANSFER COEFFICIENT AS THE SURFACE ROUGHNESS IS INCREASED. THE EXPERIMENTAL DATA SHOW THAT BUBBLE DEPARTURE FREQUENCY AND NUCLEATION SITE DENSITY INCREASE AND BUBBLE DEPARTURE DIAMETER DECREASES WITH INCREASING THE SURFACE ROUGHNESS. A NEW MODEL FOR THE PREDICTION OF HEAT TRANSFER COEFFICIENT IS PROPOSED, WHICH PREDICTS THE EXPERIMENTAL DATA WITH A SATISFACTORY ACCURACY.

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APA: Copy

AKBARI, AMIR, & Alavifazel, Seyed Ali. (2016). ROUGHNESS EFFECTS ON NUCLEATE POOL BOILING OF WATER ON HORIZONTAL STAINLESS STEEL CYLINDER. INTERNATIONAL CONFERENCE ON RESEARCH IN SCIENCE AND TECHNOLOGY. SID. https://sid.ir/paper/929231/en

Vancouver: Copy

AKBARI AMIR, Alavifazel Seyed Ali. ROUGHNESS EFFECTS ON NUCLEATE POOL BOILING OF WATER ON HORIZONTAL STAINLESS STEEL CYLINDER. 2016. Available from: https://sid.ir/paper/929231/en

IEEE: Copy

AMIR AKBARI, and Seyed Ali Alavifazel, “ROUGHNESS EFFECTS ON NUCLEATE POOL BOILING OF WATER ON HORIZONTAL STAINLESS STEEL CYLINDER,” presented at the INTERNATIONAL CONFERENCE ON RESEARCH IN SCIENCE AND TECHNOLOGY. 2016, [Online]. Available: https://sid.ir/paper/929231/en

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