buoyancy force


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buoyancy force

the force due to fluid (liquid or gas) supporting an object, resulting from the different densities of the object and the fluid. Usually acts upwards. Also known as upthrust. See also centre of buoyancy.
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nf]) principally modifies the relative balance between viscous and buoyancy forces so the heat transport in the thermal boundary layer gets only marginally affected.
As seen in Figure 10, in the case of plumes generated by the cylinder and the rectangular box in both positions, buoyancy force density and enthalpy flux have almost the same values as the respective characteristics of the plume above the thermal manikin.
When the molecular buoyancy force dominates over the thermal buoyancy force it experiences a depreciation irrespective of the directions of the buoyancy forces (fig.
As soon as the liquid metal submerged the cylindrical core, the buoyancy force on the cylinder began moving in the opposite direction to the gravity force.
When the molecular buoyancy force dominates over the thermal buoyancy force the actual temperature decreases irrespective of the directions of the buoyancy forces (fig.
This is caused by the decreased amount of metal in the mold cavity and thus reduced buoyancy force.
shows that when the Fr number is smaller or close to one, the buoyancy force dominates the inertia force but in many designs achieving this goal ends up to high pressure drop and needs to be considered during the design (Karim 2009).
When the molecular buoyancy force dominates over the thermal buoyancy force the stress at r = 1&2 enhances when the buoyancy forces act in the same direction and for the forces acting in opposite directions [absolute value of t] enhances at r = 1 and depreciates at r = 2.
In his words, "Instability occurs at the minimum temperature gradient at which a balance can be steadily maintained between the kinetic energy dissipated by viscosity and the internal energy released by the buoyancy force.
2001, 2002) included the buoyancy force in the simulation but the simulation was unable to extend to 3D situation for the model was based on stream-vorticity formulation.