Unusual Phenomenon of Forced Heat Exchange Taking Place during Quenching Silver Probe in Cold Electrolyte

Abstract

It is shown in the paper that forced heat transfer exchange during quenching silver probes in cold electrolytes is explained by periodical replacement of short film boiling process by shock boiling. The frequency of such process is very high that increases cardinally heat transfer exchange. This phenomenon doesn’t fit contemporary theory concerning nucleate boiling processes and needs further careful investigations. The reason for existing periodical process is a double boundary electrical layer where are acting increased electrical forces during quenching in electrolytes. In contrast of quenching steel, silver generates higher heat flux density during quenching; however full film boiling cannot be developed due to presence of high electrical forces in a double electrical layer caused by increased electrical conductivity of silver. The discovered phenomenon can be used in the practice in the future after its careful investigation to force heat transfer exchange by external electrical forces to eliminate any film boiling process during batch quenching.

New Evidences which Support Existence of the Forced Heat Exchange Phenomenon

“…In contrast to obtained results of calculations, during quenching silver spherical probes in electrolytes, heat transfer coefficient increases versus time in 2 -3 times that contradicts the nucleate boiling theory. Solution was found by proposing phenomenon on forced heat exchange [1,2]. If the idea is true, the same increase of heat transfer coefficient must be observed during quenching of copper spherical probes in electrolytes.…”

“…A new phenomenon of physics was discovered recently which consists in periodical replacement of film boiling by shock boiling with the high frequency [1], [2]. The idea was formulated after analysis heat transfer coefficients (HTCs) connected with the quenching of silver probe in electrolytes of optimal concentration.…”