# Formula Symbols - B

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

For other symbols see:  A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

SymbolGreek SymbolDefinitionUSMetric
$$BWR$$ - back work ratio - -
$$Ba$$ - Bagnold number dimensionless number dimensionless number
$$Ba$$ - Barlow's formula $$lb \;/\; in^2 \;or\; psi$$ $$Pa$$
$$b$$ - base - -
$$\Delta$$ Delta beam deflection, an increment $$in$$ $$mm$$
$$\Delta_{LL}$$ Delta beam deflection due to live load $$in$$ $$mm$$
$$\Delta_{TL}$$ Delta beam deflection due to total load $$in$$ $$mm$$
$$\Delta_{max}$$ Delta beam deflection maximum calculated $$in$$ $$mm$$
$$A_p$$ - bearing area $$in^2 \;or\; ft^2$$ $$mm^2 \;or\; m^2$$
$$Be$$ - Bejan number dimensionless number dimensionless number
$$b$$ - belt width $$in$$ $$m$$
$$Be$$ - Bernoulli's equation - -
$$Bm$$ - Bingham number dimensionless number dimensionless number
$$k_b$$ - binary rate coefficient - -
$$Bi$$ - Biot number dimensionless number dimensionless number
$$Bl$$ or $$B$$ - Blake number dimensionless number dimensionless number
$$y$$ - bleed fraction - -
$$u_k$$ - Block wave function - -
$$Bo$$ or $$Bd$$ - Bodenstein number dimensionless number dimensionless number
$$\mu_b$$ mu Bohr magneton constant constant
$$a_o$$   Bohr radius constant constant
$$k_B$$ - Boltzmann constant $$ft-lbf\;/\;^\circ R$$ $$J\;/\;K$$
$$H$$ - Boltzmann function - -
$$Bo$$ - Bond number dimensionless number dimensionless number
$$\Delta E$$   Borda-Carnot equation $$lbf\;/\;ft^2$$ $$Pa$$
$$BORE$$ - bore $$in$$ $$mm$$
$$A$$ - bore factor $$in^2$$ -
$$\upsilon$$ upsilon Bragg angle - -
$$b$$ - brake dimension $$in$$ $$m$$
$$BHP$$ - brake horsepower $$hp$$ -
$$BkW$$ - brake kilowatts - $$kW$$
$$BFSC$$ - brake specific fuel consumption $$lbm \;/\; hp-hr$$ $$kg \;/\; kW-h$$
$$BWR$$ - brake work ratio - -
$$b$$ - breadth - -
$$Br$$ - Brinkman number dimensionless number dimensionless number
$$B \;or\; K$$ - bulk modules $$lb \;/\; in^2 \;or\; psi$$ $$Pa$$
$$B \;or\; K$$ - bulk modules elasticity $$lb \;/\; in^2 \;or\; psi$$ $$Pa$$
$$\theta$$ theta bulk strain - -
$$T_b\;or\; T_{\infty}$$ - bulk temperature $$^\circ F$$ $$C$$
$$B$$ - buoyancy $$lbf$$ $$N$$
$$B \;or\; F_b$$ - buoyancy force $$lbf$$ $$N$$
$$b$$ - Burgers vector - -
$$p_b$$ - burst pressure $$lb \;/\; in^2 \;or\; psi$$ $$Pa$$
$$BF$$ - bypass factor - -