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日期:2024-10-09
We have derived the Continuity Equation, 4.10 using Cartesian Coordinates. It is possible to use the same system for all flows. But sometimes the equations may become cumbersome. So depending upon the flow geometry it is better to choose an appropriate .....
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日期:2024-10-10
Thanks a lot for the derivation, I was having some issues picturing the spherical element. A better way of doing it is by doing the grouping done in the last line using the product rule when you calculate each difference in mass flow rate. Also if you lea...
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日期:2024-10-09
[…] the wire, and that the magnetic field is constant in time, so that and thus , then we can apply Laplace’s equation in cylindrical coordinates to find the potential. In order to solve it, we need boundary conditions. Since the coaxial […]...
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日期:2024-10-03
Transport Phenomena 11 Rectangular coordinates: ∂ρ ∂t + ∂ ∂x (ρv x)+ ∂ ∂ (ρv y)+ ∂ ∂z (ρv z)=0 Cylindrical coordinates: ∂ρ ∂t + 1 r ∂ ∂r (ρrv r)+ 1 r ∂ ∂θ (ρv θ)+ ∂ ∂z (ρv z)=0 Spherical coordinates: ∂ρ ∂t + 1 r2 ∂ ∂r (ρr2v r)+ 1 rsinθ ∂ ∂θ (ρv θ sinθ)+ 1...
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日期:2024-10-10
1 Velocity field 2 Properties 2.1 Nonlinearity 2.2 Turbulence 2.3 Applicability 3 Derivation and description 3.1 Convective acceleration 3.2 Linear invariant stress 3.3 Other equations 3.3.1 Continuity equation 4 Incompressible flow of Newtonian fluids 5 ...
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日期:2024-10-08
In mathematics, the polar coordinate system is a two-dimensional coordinate system in which each point on a plane is determined by a distance from a fixed point and an angle from a fixed direction. The fixed point (analogous to the origin of a Cartesian s...
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日期:2024-10-05
Science activities for teachers! ... JLab Science Activities for Teachers (JSAT) Jefferson Lab, Newport News, VA September 2014 - May 2015 ATTENTION ALL 5 th, 6 th AND 8 th GRADE MIDDLE SCHOOL SCIENCE TEACHERS!...
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日期:2024-10-10
K nominal fracture toughness (based on initial crack length), psi-^nT K, stress intensity factor associated with membrane hoop stressing in pressurized cylinder, psi-^inT k dimensionless coefficient, eq. (2) p pressure, psi R radius of cylinder, in. r coo...