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Formula Symbols - F

Written by Jerry Ratzlaff on . Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

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F

SymbolGreek SymbolDefinitionUSMetricValue
\(K\) - factor - - -
\(FS\), \(\;FOS\) - factor of safety dimensionless dimensionless  -
\(n\) - fan speed \(ft\;/\;sec\) \(m\;/\;s\)  -
\(f\) - Fanning friction factor dimensionless dimensionless  -
\(Fa\) - Faraday constant constant constant \(96\;485.332...\;C\;mol^{-1}\)
\(k_f\) - Fermi angular wave vector - -  -
\(G_f^0\) - Fermi coupling constant constant constant \(1.166\;3787\;x\;10^{-5}\;GeV^{-2}\)
\(E_f\), \(\;\epsilon_f\) epsilon Fermi energy - -  -
\(h\) - film coefficient \(Btu\;/\;hr-ft^2- F\) \(W\;/\;m^2 - K\)  -
\(h\) - film thickness \(in\) \(mm\)  -
\(a_f\) - final acceleration \(ft\;/\;sec^2\) \(m\;/\;s^2\)  -
\(\omega_f\) omega final angular velocity \(ft\;/\;sec\) \(m\;/\;s\)  -
\(l_f\) - final length \(in \;or\; ft\) \(mm \;or\; m\)  -
\(x_f\) - final position \(in \;or\; ft\) \(mm \;or\; m\)  -
\(T_f\) - final temperature \(^\circ F\) \(C\)  -
\(t_f\) - final time \(sec\) \(s\)  -
\(v_f\) - final velocity \(ft\;/\;sec\) \(m\;/\;s\)  -
\(V_f\) - final volume \(in^3 \;or\; ft^3\) \(mm^3 \;or\; m^3\)  -
\(\alpha\) alpha fine structure constant dimensionless constant dimensionless constant \(7.297\;352\;5693\;x\;10^{-3}\)
\(c_1\) - first radiation constant constant constant \(3.741\;771\;852...\;x\;10^{-16}\;W\;m^2\)
\(c_1l\) - first radiation constant for spectral radiance constant constant \(1.191\;042\;972...\;x\;10^{-16}\;W\;m^2\;sr^{-1}\)
\(t_f\) - flange thickness \(in\) \(mm\)  
\(FS\) - flash steam percent percent  -
\(T\) - flight time \(sec\) \(s\)  -
\(q\) - flow \(ft^3 \;/\; sec\) \(m^3\;/\;s\)  -
\(C_v\), \(\;K_v\) - flow coefficient \(lb\;/\;in^2 \;or\; psi\)  \(Pa\)   -
\(Q\) - flow rate \(ft^3 \;/\; sec\) \(m^3 \;/\; s\)  -
\(Q\) - flow rate capacity \(ft^3 \;/\; sec\) \(m^3 \;/\; s\)  -
\(Q_a\) - flow rate of air \(CFM\) \(LPM\)  -
\(Q_s\) - flow rate of steam - -  -
\(Q_w\) - flow rate of water \(gal\;/\;min\) \(L\;/\;m\)  -
\(Q\), \(\;V\) - flow velocity - -  -
\(P_c\) - fluid critical pressure \(lb\;/\;in^2 \;or\; psi\) \(Pa\)  -
\(\rho_f\) rho fluid density \(lb\;/\;ft^3\) \(kg\;/\;m^3\)  -
\(Y\) - fluid expansion factor for vapor flow - -  -
\(h\) - fluid head \(ft\) \(m\)  -
\(\Delta E\) - fluid mehanical energy loss \(ft-lbf\) \(J\)  -
\(\xi\) xi fluid resistance coefficient - -  -
\(P_v\) - fluid vapor pressure \(lb\;/\;in^2 \;or\; psi\) \(Pa\)  -
\(v\) - fluid velocity \(ft\;/\;sec\) \(m\;/\;s\)  -
\(\Delta v_f\) - fluid velocity change \(ft\;/\;sec\) \(m\;/\;s\)  -
\( F\) - force \(lbf\) \(N\)  -
\(F_d\), \(\;\Delta F\) delta force differential \(lbf\) \(N\)  -
\(F_a\) - force of air resistance or drag \(lbf\) \(N\)  -
\(P\) - force of impression \(lbf\) \(kg\)  -
\(F\) - formality - \(FW\;/\;L\)  -
\(FW\) - formula weight \(lbm\;/\;lbmol\) \(kg\;/\;kmol\)  -
\(Fo\) - Fourier number dimensionless dimensionless  -
\(g\) - Fourier's law - - -
\(x\) - fraction - -  -
\(f\) - fraction split - -  -
\(v_f\) - friction velocity - - -
\(d_{\infty}\)  - free steam density \(lb\;/\;ft^3\) \(kg\;/\;m^3\)  -
\(\rho_{\infty}\) rho  free steam pressure \(lb\;/\;in^2 \;or\; psi\) \(Pa\)  -
\(v_{\infty}\)  - free steam velocity \(ft\;/\;sec\) \(m\;/\;s\)  -
\(F\) - Fresnel number dimensionless dimensionless  -
\(f\), \(\;\nu\) nu frequency \(Hz \;or\; ft\) \(HZ \;or\; m\)  -
\(f\) - friction - \( N\)  -
\(\mu\) mu friction coefficient dimensionless dimensionless  -
\(h_fd\)   friction discharge head \(ft\) \(m\)  -
\(f\) - friction factor - -  -
\(F_f\) - friction force - -  -
\( FHP\) - friction horsepower \(hp\) -  -
\(FL\) - friction loss - - -
\(\xi\), \(\;C\) xi friction loss coefficient - - -
\( FP\) - friction pressure \(in \; wg\) \(Pa\)  -
\(h_{fs}\)   friction suction head \(ft\) \(m\)  -
\(RA\) - fractional reduction in area - -  -
\(F\) - Fresnel number dimensionless dimensionless  -
\(Fo\) - Fourier number dimensionless dimensionless  -
\(Fr\) - Froude number dimensionless dimensionless  -
\(FAR\) - fuel-air ratio \(lbm\) \(kg\)  -
\(s'\) - fuel economy \(mi\;/\;gal\) \(km\;/\;L\)  -
\(m_f\) - fuel mixture \(lbm\) \(kg\)  -
\(FU\) - fuel utilization - -  -
\(f\) - function - -  -
Symbol Greek Symbol Definition US Metric Value

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