Numerical Simulation Study of Micro-oil Droplet Impinging Wall under the Influence of Transient Excitation
During the work of oil and gas micro-lubrication system,effective lubrication is the key to ensure the stable operation of the parts.However,the vibration of working parts can affect the spreading of oil droplets and disturb the forma-tion of lubricant film,thus affecting the lubrication effect of the parts.Based on the CLSVOF method,a model of oil droplet impinging the vibrating wall was established,and the oil morphology evolution law during the oil droplet impacting the tran-sient exciting wall was investigated.It is found that the oil droplet impinging the excited wall produces splash and neck jet phenomenon.At different vibration frequencies,the time of secondary splash generated by oil droplet impingement is around 1/5 of the whole period.The wall vibration reduces the maximum spreading factor of oil droplets and prolongs the spreading time of oil droplets.In the retraction phase,the oil droplet spreading factor shows a typical oscillatory decay.
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