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<br />. <br /> <br />2S <br /> <br />. <br /> <br />Each investigation had at least some success in resolving the difficulties, but <br />faced additional drawbacks as well. Thus, the differences between the <br />experimental investigations present an opportunity for comparing and <br />analyzing these resolutions and drawbacks. Carrying out this task will bring a <br />further understanding of these problems and establish some of the factors <br />affecting the reliability of the data. The results will help determine the weight <br />that each datum should carry, and resolve some of the inconsistencies <br />between the data. <br />An obvious indicator of the reliability of the data sets is the <br />chronological order of the performed experiments. Experimental studies <br />performed most recently tend to have problems that are more thoroughly <br />understood, and sound experimental procedures for resolving these <br />drawbacks. An example of this indicator are the problems and techniques <br />associated with the measurements of the upward flow speed in the <br />suspension chamber used by Kowa (1981), Gong and Fukuta (1985) and <br />Takahashi and Fukuta (to be published). Kowa used the standard pitot tube <br />arrangement to measure the flow speed in a tube just above the suction <br />chamber. The location of this tube arrangement creates uncertainty due to <br />the probable differences between the flow field in the suspension chamber <br />and the tube above the suction chamber. Gong and Fukuta resolved this <br />dilemma by placing the sensor of a hot wire anemometer in the suspension <br />chamber near the position of the ice crystal. However, they did not consider <br />the effects of the impacting drops colliding with the sensor. Takahashi and <br />Fukuta placed the sensor in the tube above the suction chamber and <br />predetermined the necessary correction factors. Since the suction chamber <br />filtered out most of the fog droplets, the changes made by Takahashi and <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br />