Formula Symbols - V
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V
| Symbol | Greek Symbol | Definition | US | Metric | Value |
|---|---|---|---|---|---|
| \(p_v\) | - | vacuum pressure | \(lb\;/\;in^2 \;or\; PSI\) | \(Pa\) | - |
| \(\varepsilon_0\) | varepsilon | vacuum electric permittivity | constant | constant | \(8.854\;187\;8128\;x\;10^{-12}\;F\;m^{-1}\) |
| \(\mu_0\) | mu | vacuum magnetic permeability | constant | constant | \(1.256\;637\;062\;12\;x\;10^{-6}\;N\;A^{-2}\) |
| \(Va\) | - | Vadasz number | dimensionless | dimensionless | - |
| \(C_v\), \(\;K_v\) | - | valve flow coefficient | \(lb\;/\;in^2 \;or\; PSI\) | \(Pa\) | - |
| \(P_1\) | - | valve inlet pressure | \(lb\;/\;in^2 \;or\; PSI\) | \(Pa\) | - |
| \(P_2\) | - | valve outlet pressure | \(lb\;/\;in^2 \;or\; PSI\) | \(Pa\) | - |
| \(F_o\) | - | valve style modifier | dimensionless | dimensionless | - |
| \(C_v\) | - | valve sizing coefficient | - | - | - |
| \(Re_v\) | valve Reynolds number | dimensionless | dimensionless | - | |
| \(G_{vd}\) | - | vapor density of gas | \(lb\;/\;ft^3\) | \(kg\;/\;m^3\) | - |
| \(p_v\) | - | vapor pressure | \(lb\;/\;in^2 \;or\; PSI\) | \(Pa\) | - |
| \(p_s\) | - | vapor pressure of the solution | \(lb\;/\;in^2 \;or\; PSI\) | \(Pa\) | - |
| \(p_s^0\) | - | vapor pressure of pure solution | \(lb\;/\;in^2 \;or\; PSI\) | \(Pa\) | - |
| \(c\), \(\;v\), \(\;u\), \(\;\omega\) | omega | velocity | \(ft\;/\;sec\) | \(m\;/\;s\) | - |
| \(v_{cm}\) | velocity center of mass | \(ft\;/\;sec\) | \(m\;/\;s\) | - | |
| \(C_v\) | - | velocity coefficient | - | - | - |
| \(\nu\) | nu | velocity gradient | \(ft\;/\;sec\) | \(m\;/\;s\) | - |
| \(h_v\) | - | velocity head | \(ft\) | \(m\) | |
| \(c_l\) | - | velocity of longitudinal waves | - | - | - |
| \(c\) | - | velocity of sound | - | - | - |
| \(c_t\) | - | velocity of transverse waves | - | - | - |
| \(v_s\) | - | velocity of steam | \(ft\;/\;sec\) | \(m\;/\;s\) | - |
| \(v_w\) | - | velocity of water | \(ft\;/\;sec\) | \(m\;/\;s\) | - |
| \( \Delta v\), \(\;dv\), \(\;\Delta\omega\) | omega | velocity differential | \(ft\;/\;sec\) | \(m\;/\;s\) | - |
| \(\nu\) | nu | velocity gradient | \(ft\;/\;sec\) | \(m\;/\;s\) | - |
| \(VP\) | - | velocity pressure | \(in\;/\;wg\) | \(Pa\) | - |
| \(P\), \(\;P_v\) | - | velocity power | \(ft-lbf\;/\;sec\) | \(J\;/\;s\) | - |
| \(p_{vc}\) | - | vena contracta | \(lb\;/\;in^2 \;or\; PSI\) | \(Pa\) | - |
| \(y\) | - | vertical distance | \(ft\) | \(m\) | - |
| \(y\) | - | vertical position | \(ft\) | \(m\) | - |
| \(R\) | - | vertical reaction load at bearing point | \(lbf\) | \(N\) | - |
| \(V\) | - | vertical shear force | \(lbf\) | \(N\) | - |
| \(v\) | - | vibrational | - | - | - |
| \(\eta\), \(\;\mu\) | eta, mu | viscosity | \(lbf-sec \;/\; ft^2\) | \(Pa-s\) | - |
| \(\eta\) | eta | viscosity coefficient | \(lbf-sec \;/\; ft^2\) | \(Pa-s\) | - |
| \(\Delta \eta\), \(\;\eta_d\) | eta | viscosity differential | \(lbf-sec \;/\; ft^2\) | \(Pa-s\) | - |
| \(VI\) | - | viscosity index | - | - | - |
| \(\eta_s\), \(\;\mu_s\) | eta, mu | viscosity of a solution used | \(lbf-sec \;/\; ft^2\) | \(Pa-s\) | - |
| \(\eta\) | eta | viscous force | \(lbf-sec \;/\; ft^2\) | \(Pa- s\) | - |
| \(e\) | - | void ratio | - | - | - |
| \(E\), \(\;V\) | - | volt | \(volt\) | \(volt\) | - |
| \(E\), \(\;V\) | - | voltage | \(volt\) | \(volt\) | - |
| \(VR\) | - | voltage ratio | - | - | - |
| \(V\), \(\;\upsilon\) | upsilon | volume | \(in^3 \;or\; ft^3\) | \(mm^3 \;or\; m^3\) | - |
| \(V_a\) | - | volume of air | \(in^3 \;or\; ft^3\) | \(mm^3 \;or\; m^3\) | - |
| \(V_d\), \(\;\Delta V\) | Delta | volume differential | \(ft^3\) | \(m^3\) | - |
| \(\phi\) | phi | volume fraction | - | - | - |
| \(V_s\) | - | volume of solid soil | \(in^3 \;or\; ft^3\) | \(mm^3 \;or\; m^3\) | - |
| \(\theta\) | theta | volume strain | - | - | - |
| \(V_t\) | - | volume total | \(in^3 \;or\; ft^3\) | \(mm^3 \;or\; m^3\) | - |
| \(V_v\) | - | volume of voids | \(in^3 \;or\; ft^3\) | \(mm^3 \;or\; m^3\) | - |
| \(V_w\) | - | volume of water | \(in^3 \;or\; ft^3\) | \(mm^3 \;or\; m^3\) | - |
| \(\beta\) | beta | volumetric coefficient of expansion | \(1\;/\; ^\circ R\) | \(1\;/\; K\) | - |
| \(VE\) | - | volumetric efficiency | \(lbm\;/\;in^3\) | \(kg\;/\;mm^3\) | - |
| \(Q\), \(\;V \), \(\;\dot {V}\) | - | volumetric flow rate | \(ft^3\;/\;sec\) | \(m^3\;/\;s\) | - |
| \(B\) | - | volumetric fraction | - | - | - |
| \(\Delta V\) | - | volumetric thermal expansion | \(ft^3\) | \(m^3\) | - |
| \(\alpha_v\) | alpha | volumetric thermal expansion coefficient | \(ft^3\) | \(m^3\) | - |
| \(\theta\) | theta | volumetric water content | \(ft^3\) | \(m^3\) | - |
| \(k\) | - | von Karman constant | - | - | - |
| \(R_k\) | - | von Klitzing constant | constant | constant | \(2.581\;280\;744\;34\;x\;10^4\;kg\;m^2\;s^{-3}\;A^{-2}\) |
| Symbol | Greek Symbol | Definition | US | Metric | Value |