# Formula Symbols - H

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

SymbolGreek SymbolDefinitionUSMetric
$$Hg$$ - Hagen number dimensionless number dimensionless number
$$Ha$$ - Hartmann number dimensionless number dimensionless number
$$Ha$$ - Hatta number dimensionless number dimensionless number
$$h$$ - head $$ft$$ $$m$$
$$q$$ - heat $$Btu/lbm$$ $$kJ/kg$$
$$C$$ - heat capacity - -
$$Q$$ - heat conduction - -
$$Q$$ - heat convection - -
$$Q$$ - heat radiation - -
$$\phi$$ phi heat radiation - -
$$\Delta Q$$ - heat differential - -
$$Q$$ - heat flow rate $$Btu/sec$$ $$kW$$
$$G$$ - heat generation rate $$Btu/hr-ft^3$$ $$W/m^3$$
$$q$$ - heat loss $$Btu/lbm$$ $$kJ/kg$$
$$q$$ - heat per unit mass $$Btu/lbm$$ $$kJ/kg$$
$$Q$$ - heat transfer $$Btu/hr$$ $$W$$
$$C_q$$ - heat transfer coefficient $$Btu/hr-ft^2-^\circ F$$ $$W/m^2\cdot K$$
$$h$$ - heat transfer coefficient $$Btu/hr-ft^2-^\circ F$$ $$W/m^2\cdot K$$
$$Q_t$$ - heat transfer rate - $$cm^2/s$$
$$HV$$ - heating value $$Btu/lbm$$ $$kJ/kg$$
$$h$$ - height $$ft$$ $$m$$
$$H$$ - horizontal cable force $$lbf$$ $$N$$
$$HP$$ - horsepower $$hp$$ -
$$He$$ - Henry's law constant $$l/atm$$ $$l/atm$$
$$HWD$$ - hot well depression $$^\circ F$$ $$^\circ C$$
$$\omega$$ omega humidity ratio $$lbm/lbm$$ $$kg/kg$$
$$d_h$$ - hydraulic diameter $$ft$$ $$m$$
$$i$$ - hydraulic gradient dimensionless number dimensionless number
$$r_h$$ - hydraulic radius - -
$$HP$$ - hydrostatic pressure - -