Tangential quadrilaterals are a special case of tangential polygons. Radial diffusion is somewhat faster than tangential diffusion. It is the ratio of linear velocity to tangential velocity for swirl flows. Ceramics lend themselves to circular motifs, whether radial or tangential. The volume shrinkage is mostly due to the radial and tangential shrinkage. Accelerating the flow in the tangential direction increases the absolute velocity. The normal force is actually the sum of the radial and tangential forces. Tire forces are divided into three axes&colon; radial, lateral, and tangential (or fore-aft). These theories include those based on mechanical buckling, axonal tension, and differential tangential expansion. The greatest dimensional change occurs in a direction tangential to the growth rings. Such arms are known as "linear tracking" or "tangential" arms. Proteins can also be separated by size in a tangential flow filtration or an ultrafiltration. This is called an impulse or tangential turbine. A polygon that is both cyclic and tangential is called a bicentric polygon. The liquid in them moves in tangential direction around the working wheel.