The phrase "a layer of viscous" is correct and usable in written English.
It can be used when describing a substance that has a thick, sticky consistency, often in scientific or technical contexts.
Example: "The experiment required a layer of viscous gel to be applied to the surface for optimal adhesion."
Alternatives: "a coating of thick" or "a film of sticky".
The plane flow of a layer of incompressible viscous magnetic fluid with constant magnetic permeability under the action of a traveling magnetic field is analyzed.
Bell stated that Nicotero placed a skin-colored prosthetic around her neck, which consisted of a layer of red viscous liquid and a hose.
In addition, many bacteria develop biofilm – a thick layer of viscous materials that protect them from antibiotics.
Necropsy showed ascites (clear yellowish fluid), hepatomegaly (stiff liver consistency, yellow-pink), mild splenomegaly, and hemorrhagic enteritis with thickening of the intestinal wall; the finding of hemorrhagic enteritis was unclear because the intestinal mucosa was hyperemic and covered with a thick layer of viscous mucus that contained blood.
The thin-film equation is usually used to describe the motion of a very thin layer of viscous incompressible fluids along an inclined plane such as the draining of foams and the movement of contact lenses.
The results show that the equivalent hydrodynamic roughness produced by a wall coating layer of viscous oil is dependent on the coating thickness but essentially independent of oil viscosity.
Draining a viscous liquid from a partially filled, finite-size cylindrical tank through a tube imbedded in the liquid is viewed as selective withdrawal from the lower layer of viscous liquid in an identical tank, with the fluid of the upper layer being air or low-viscosity gas.
Earth's mantle, the vast layer of viscous rock between its molten iron core and the outer shell of tectonic plates, may look much like one of those lava lamps that were all the rage in the '70s.
The duo found that inclusions that formed more than 3 billion years ago fall into a class of minerals known as peridotites, the most abundant type of rock in the mantle, the thick layer of viscous, largely molten rock that lies between Earth's crust and outer core.
