Falling-Film Solidification Rates for Water inside a Short Vertical Tube

1972 ◽  
Vol 94 (3) ◽  
pp. 305-309 ◽  
Author(s):  
T. E. Mullin ◽  
R. B. Renda
Keyword(s):  
Experimental Data ◽  
Experimental Investigation ◽  
Temperature Difference ◽  
Film Flow ◽  
Vertical Tube ◽  
Falling Film ◽  
Reasonable Accuracy ◽  
Fusion Temperature ◽  
Ice Field ◽  
Good Agreement

The purpose of this investigation was twofold: (1) to present the results of an experimental investigation of the solidification rates for water at its fusion temperature in falling-film flow inside a short vertical tube and (2) to compare the experimental results to those predicted from the expression developed by London and Seban [1]. The experimental data were in good agreement with those values predicted by their expression when evaluated on a weight-of-ice-formed basis. However, the liquid-solid interface radius rs could be determined with reasonable accuracy only for large values of rs. It was shown that by increasing the temperature difference across the ice field, closer agreement was obtained in both cases. It is believed that erosion of the ice by the liquid falling film is responsible for most of the deviations.

scholarly journals Modelling the Depth of Jet Penetration in Abrasive Waterjet Contouring of Alumina Ceramics

2004 ◽  
Vol 471-472 ◽  
pp. 462-468
Author(s):  
Jun Wang ◽  
H. Liu ◽  
Chuan Zhen Huang
Keyword(s):  
Experimental Data ◽  
Experimental Investigation ◽  
Mathematical Models ◽  
Alumina Ceramic ◽  
Abrasive Waterjet ◽  
Alumina Ceramics ◽  
Predictive Capability ◽  
Jet Penetration ◽  
Good Agreement

Predictive mathematical models for the depth of jet penetration are presented for both straight-slit cutting and contouring by an abrasive waterjet (AWJ). The plausibility and predictive capability of the models are assessed and verified by an experimental investigation when cutting an 87% alumina ceramic. It shows that the predictions of the models are in good agreement with the experimental data.

Experimental investigation of fully developed falling film flow in the presence of conduction pumps

2015 ◽  
Vol 73 ◽  
pp. 71-79 ◽  
Author(s):  
A. Sobhani ◽  
Sh. Nasirivatan ◽  
R. Gharraei ◽  
E. Esmaeilzadeh
Keyword(s):  
Experimental Investigation ◽  
Film Flow ◽  
Falling Film

scholarly journals Experimental Investigation of Convection Heat Transfer in High Pressure and High Temperature Gas Flows

2017 ◽  
Vol 139 (9) ◽  
Author(s):  
Francisco I. Valentín ◽  
Ryan Anderson ◽  
Masahiro Kawaji
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Experimental Investigation ◽  
Convection Heat Transfer ◽  
Simulation Models ◽  
Vertical Tube ◽  
Flow Channel ◽  
Test Facility ◽  
Convection Heat ◽  
Heater Power

This work focuses on an experimental investigation of convection heat transfer to a gas in a vertical tube under strongly heated conditions at high temperatures and pressures up to 943 K and 65 bar. A unique test facility for convection heat transfer experiments has been constructed, and used to obtain experimental data useful for better understanding and validation of numerical simulation models. This test facility consists of a single flow channel in a 2.7 m long, 0.11 m diameter graphite column with four 2.3 kW heaters placed symmetrically around the 16.8 mm diameter flow channel. Upward flow convection experiments with air and nitrogen were conducted for inlet Reynolds numbers from 1300 to 60,000, thus covering laminar, transition, and fully turbulent flow regimes. Experiments were performed at different flow rates (3.8 × 10−4 to 1.5 × 10−2 kg/s) and heater power up to 6 kW. Importantly, the data analysis considered the thermophysical properties of the gas and graphite changing with temperature and pressure. Nusselt number results are further compared to existing correlations. The effect of pressure and heater power on degraded heat transfer is examined. The analyses of the experimental data showed significant reductions in Reynolds number of up to 50% and Nusselt numbers of up to 90% between the gas inlet and outlet.

Transient Behavior of a Springless Flapper Valve: Closing Motion

1998 ◽  
Vol 120 (3) ◽  
pp. 678-684
Author(s):  
K. A. Temple ◽  
V. W. Goldschmidt ◽  
J. D. Jones
Keyword(s):  
Experimental Data ◽  
Experimental Investigation ◽  
Simultaneous Measurement ◽  
Transient Behavior ◽  
Analytical Investigation ◽  
Closing Time ◽  
Model Predictions ◽  
Good Agreement

The closing of a springless flapper valve was investigated in order to gain a better understanding of the transient behavior of the valve. An experimental investigation included simultaneous measurement of pressure and flapper velocity. An analytical investigation included the development of a model to predict the closing of the flapper valve. The flapper closing was experimentally determined to require from 18 to 24 percent of a cycle, and the model predictions were in good agreement with experimental data for the flapper closing time. The present study should be a useful contribution to future modeling of flapper valves and other springless valves.

Diameter Effects on Nucleate Pool Boiling for a Vertical Tube

2000 ◽  
Vol 123 (2) ◽  
pp. 400-404 ◽  
Author(s):  
Myeong-Gie Kang
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Heat Transfer Coefficient ◽  
Boiling Heat Transfer ◽  
Pool Boiling ◽  
Vertical Tube ◽  
Nucleate Pool Boiling ◽  
Vertical Orientation ◽  
The Heat Transfer Coefficient ◽  
Good Agreement

Diameter effects on nucleate pool boiling heat transfer for a tube with vertical orientation have been obtained experimentally. According to the results (1) the heat transfer coefficient decreases as the tube diameter increases and the trend is more notable with a rougher surface, and (2) the experimental data is in good agreement with the Cornwell and Houston’s correlation within a ±20 percent scatter range.

Sign in / Sign up

Export Citation Format

Share Document