# Thermal Conductivity Constant

on . Posted in Constants

The thermal conductivity constant, abbreviated as $$k_t$$, also called thermal conductivity, is a material property that measures how well a substance conducts heat.  Thermal conductivity quantifies the rate at which heat flows through a material when there is a temperature difference across it.  Materials with high thermal conductivity allow heat to flow through them quickly, while materials with low thermal conductivity impede the flow of heat.

The thermal conductivity constant is an important parameter in various engineering and scientific applications, including the design of heat exchangers, insulation materials, and the analysis of heat transfer in various systems.  The value of thermal conductivity can vary significantly between different materials, so it's essential to consider this property when dealing with heat transfer and thermal insulation calculations.

## Thermal Conductivity Constant formula

$$\large{ k_t = \frac{ \dot {Q}_t \; l }{ \Delta T } }$$     (Thermal Conductivity Constant)

$$\large{ \dot {Q}_t = \frac{ k_t \; \Delta T }{ l } }$$

$$\large{ l = \frac{ k_t \; \Delta T }{ \dot {Q}_t } }$$

$$\large{ \Delta T = \frac{ \dot {Q}_t \; l }{ k_t } }$$

Symbol English Metric
$$\large{ k_t }$$ = thermal conductivity constant $$\large{\frac{Btu-ft}{hr-ft^2-F}}$$ $$\large{\frac{W}{m-K}}$$
$$\large{ \dot {Q}_t }$$ = heat transfer rate $$\large{\frac{Btu}{hr}}$$ $$\large{W}$$
$$\large{ l }$$ = length $$\large{ft}$$ $$\large{m}$$
$$\large{ \Delta T }$$ = temperature differential $$\large{F}$$ $$\large{K}$$ 