# Convective Heat Transfer

Heat transfer by convection

**Library:**Simscape / Foundation Library / Thermal / Thermal Elements

## Description

The Convective Heat Transfer block represents heat transfer by convection between two bodies by means of fluid motion. The Newton law of cooling describes the transfer,

$$Q=k\cdot A\cdot ({T}_{A}-{T}_{B}),$$

where:

*Q*is the heat flow.*k*is the convection heat transfer coefficient.*A*is the surface area.*D*is the distance between layers, that is, the thickness of material.*T*_{A}and*T*_{B}are the temperatures of the two bodies.

The heat transfer coefficient, *k*, can be either constant, which you
specify by using the **Heat transfer coefficient** parameter, or variable,
which you specify by using the physical signal at port **K**.

**A** and **B** are thermal conserving ports associated
with the points between which the heat transfer by convection takes place. Because the block
positive direction is from port **A** to port **B**, the
heat flow is positive if it flows from **A** to **B**.

### Variables

To set the priority and initial target values for the block variables prior to simulation, use
the **Initial Targets** section in the block dialog box or Property
Inspector. For more information, see Set Priority and Initial Target for Block Variables.

Nominal values provide a way to specify the expected magnitude of a variable in a model.
Using system scaling based on nominal values increases the simulation robustness. Nominal
values can come from different sources, one of which is the **Nominal
Values** section in the block dialog box or Property Inspector. For more
information, see Modify Nominal Values for a Block Variable.

## Ports

### Input

### Conserving

## Parameters

## Extended Capabilities

## Version History

**Introduced in R2007b**