"provide buoyancy" is a correct and usable phrase in written English.
You can use it whenever you are talking about something providing support or lift, such as a boat or a life jacket. For example: "The boat's design helped it to provide buoyancy even in rough waters."
These are air-filled sacs that provide buoyancy.
The sphere drive is hollow, helping to provide buoyancy as well as locomotion when the Terrainiac takes to the water.
In the case of BarCap, Barclays argues that strengths in lower-risk areas, like fixed-income and foreign exchange trading on behalf of clients, provide buoyancy.
Buoys in deep water need to be large in order to provide buoyancy sufficient to support the extra weight of chain.
The front and back feet are fully webbed; large lungs allow long dives and provide buoyancy; and thick fur provides insulation.
Since the 1920's, women have often swum the English Channel faster than men, in part, because of a greater amount and better distribution of body fat to provide buoyancy and insulation.
During a flood, the boxes would function like the hull of a ship, providing buoyancy.
The feeling of momentum that is currently providing buoyancy for the climate change movement must be shared by a larger group of the population.
Most of the rest of the sub's structure was taken up by specially designed pressure-resistant syntactic foam, which provided buoyancy.
When the pappus consists of numerous capillary bristles, as in Taraxacum officinale (dandelion), it facilitates distribution of the achenes by the wind by providing buoyancy.
Drilling mud is added to the wellbore to facilitate the drilling process by suspending cuttings, controlling pressure, stabilizing exposed rock, providing buoyancy, and cooling and lubricating.
