混合记录气膜温度场仿真

Study on hybrid sliding air film temperature field

混合记录是实现超高密度存储的重要途径之一,是当前国际超高密度存储研究的热点。该技术利用高矫顽力的磁记录材料进行热辅助写入,并在常温下读出和保存,可克服超顺磁极限实现超高密度存储。基于对流换热理论建立了混合记录介质与浮动气膜间的对流换热模型。磁头在不同的飞行姿态下分别可以用层流换热模型和紊流换热模型来求解气膜温度场。注意到磁记录磁头飞高在纳米量级的特点,运用边界层理论求解了浮动气膜的温度场,得到了近场光、磁混合记录中由近场馈热导致气膜温升的影响规律及相关的数据,

Hybrid recording is one of the branches with super high-density storage in the field of information storage;it is a hot point in ultra-high data storage field in the world.In a hybrid recording scheme,writing is done at an elevated temperature where the high coercive force of media reduces to the range of head writing field,reading and storage are archived at room temperature.This technology can break through the super paramagnetic limit for longitudinal recording to realize ultra-high data storage.Based on the convection heat transfer theory,we model the heat transfer between hybrid recoding medium and the sliding air film.The heat transfer between hybrid recording and the sliding air film can be described by the laminar heat transfer process or the turbulent heat transfer process.Since hybrid recording head gap is in the level of nanometer in dimension,the temperature gradient field of slider air film can be simulated by boundary layers theory.We simulated the rule of the influence and some data of the air film heated by the near field optical in hybrid recording.The influence of heating-up of air film to the slider bearing system is researched by computer simulation,and the rule of the influence and some conclusions related are obtained.