Methods of Heat Transfer

Methods of Heat Transfer

1. Conduction

• Heat travels from one molecule to another through a solid object.
• Example: Frying food on a pan – heat moves from the ring to the pan, then cooks the food.

2. Convection

• When liquids and gases are heated, they rise and cooler liquids or gases replace them, creating convection currents.
• Example: Baking in an oven – hot air circulates around the food.

3. Radiation

• Heat is transferred directly from a source to the surface of the food.
• Example: Grilling – heat rays from the grill cook the food without needing contact.

---

• Many cooking methods combine heat transfer techniques. For example, boiling pasta involves conduction (heating the saucepan) and convection (water heating and cooking the pasta).