"fluid shape" is a correct and usable phrase in written English.
You can use it to describe something with soft, rounded edges that is able to change shape easily, such as liquid or sand. For example, "The sand settled into a fluid shape on the beach".
Studies of nature -- say, the tip of a flower stamen -- inspired the screen's fluid shape.
How this forces the characters to reconsider their own identities and relationships is what gives "Burn This" its compellingly fluid shape.
Its striking fluid shape was designed to combine the outlines of three iconic chairs, but it's now become something of an icon itself.
From the beginning (in the 2003 model year) Nissan's design strategy for the Murano was to create the iconic un-S.U.V. with a fluid shape that would never be mistaken for a Honda Pilot, a Toyota Highlander — or a Nissan Pathfinder.
This two-button blazer and wool-crepe trouser has a light, fluid shape, ideal for warm days, and the straight-leg trouser hits just above the hip.
ANCF elements are used in this investigation to describe complex mesh geometries, to capture the change in inertia due to the change in the fluid shape, and to accurately calculate the centrifugal forces, which for flexible bodies do not take the simple form used in rigid body dynamics.
This idea she said was reflected in more fluid shapes.
When six women entered, delicate in pastel dresses, their fluid shapes replaced the tension with a more lyrical mood.
Ms. Missoni has taken something of a risk with her abstract camouflage patterns, patch-pocket cotton skirts and long fluid shapes redolent of a hippie beach wedding.
A new aesthetic emerged as designers experimented with recently developed plastics, textiles and other materials to create fluid shapes and vivid colors, which had been unattainable before.
