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2. Diesel exhaust fluid - Wikipedia

   en.wikipedia.org/wiki/Diesel_exhaust_fluid

   Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue [3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water .

3. Diesel exhaust - Wikipedia

   en.wikipedia.org/wiki/Diesel_exhaust

   Selective catalytic reduction (SCR) injects a reductant such as ammonia or urea — the latter aqueous, where it is known as diesel exhaust fluid (DEF) — into the exhaust of a diesel engine to convert nitrogen oxides (NO x) into gaseous nitrogen and water.

4. Compressor - Wikipedia

   en.wikipedia.org/wiki/Compressor

   The stationary airfoils, also known as stators or vanes, decelerate and redirect the flow direction of the fluid, preparing it for the rotor blades of the next stage. [1] Axial compressors are almost always multi-staged, with the cross-sectional area of the gas passage diminishing along the compressor to maintain an optimum axial Mach number .

5. Compressible flow - Wikipedia

   en.wikipedia.org/wiki/Compressible_flow

   Compressible flow (or gas dynamics) is the branch of fluid mechanics that deals with flows having significant changes in fluid density.While all flows are compressible, flows are usually treated as being incompressible when the Mach number (the ratio of the speed of the flow to the speed of sound) is smaller than 0.3 (since the density change due to velocity is about 5% in that case). [1]

6. de Laval nozzle - Wikipedia

   en.wikipedia.org/wiki/De_Laval_nozzle

   Diagram of a de Laval nozzle, showing approximate flow velocity (v), together with the effect on temperature (T) and pressure (p) A de Laval nozzle (or convergent-divergent nozzle, CD nozzle or con-di nozzle) is a tube which is pinched in the middle, with a rapid convergence and gradual divergence.

7. Hemodynamics - Wikipedia

   en.wikipedia.org/wiki/Hemodynamics

   Laminar shear of fluid between two plates. =, =. Friction between the fluid and the moving boundaries causes the fluid to shear (flow). The force required for this action per unit area is the stress. The relation between the stress (force) and the shear rate (flow velocity) determines the viscosity.

8. Research Finds Link Between This Childhood Virus and ... - AOL

   www.aol.com/research-finds-between-childhood...

   The researchers found the presence of CMV antibodies all over patients with Alzheimer's disease, including the intestines, spinal fluid, brains, and vagus nerves.

9. Fluid - Wikipedia

   en.wikipedia.org/wiki/Fluid

   In physics, a fluid is a liquid, gas, or other material that may continuously move and deform (flow) under an applied shear stress, or external force. [1] They have zero shear modulus , or, in simpler terms, are substances which cannot resist any shear force applied to them.