Navigate to the ringtone file on your computer and click Transfer.. If you do not have any ringtone files, you can create your own ringtones using apps on your iPhone or in iTunes. Also, there are several websites that offer free iPhone ringtone files, which can be found quickly using your favorite web search engine.
Definition of convection. 1  1 : the action or process of conveying. 2  2a : movement in a gas or liquid in which the warmer parts move up and the cooler parts move down convection currentsb : the transfer of heat by convection foods cooked by convection â compare conduction, radiation.
Convective heat transfer, often referred to simply as convection, is the transfer of heat from one place to another by the movement of fluids. Convection is usually the dominant form of heat transfer in liquids and gases. Although often discussed as a distinct method of heat transfer, convective heat transfer involves the combined processes of unknown conduction (heat diffusion) and advection (heat transfer by bulk fluid flow).