Heat Transfer Virtual Lab
Explore conduction, convection and radiation through three interactive experiments. Change materials, temperatures, heating power and distance to investigate how thermal energy is transferred.
Heat transfers through a material from a region of higher temperature toward a region of lower temperature.
Higher thermal conductivity → faster heat transfer.
Heated water expands and becomes less dense.
Warm water rises ↑
Cooler, denser water sinks ↓
This creates a convection current.
For a simplified point-source model:
Intensity ∝ 1 / d²
Doubling distance reduces the received intensity to approximately one quarter.
📊 Observation Table
| Trial | Experiment | Condition | Reading 1 | Reading 2 | Observation |
|---|---|---|---|---|---|
| No readings recorded. | |||||
🔍 Compare the Three Methods
🎯 Aim
To investigate the three major modes of heat transfer: conduction, convection and radiation.
🧰 Apparatus
Virtual metal rods, heater, temperature sensors, water container, thermal source and radiation sensor.
📘 What is Heat Transfer?
Heat transfer is the transfer of thermal energy caused by a temperature difference.
🔥 Conduction
Conduction occurs when thermal energy is transferred through microscopic interactions within a material without bulk movement of the material itself.
Copper
Aluminium
Iron
Glass
Observe which material transfers heat fastest in this educational model.
🌊 Convection
Convection occurs in fluids when warmer regions move and transport thermal energy.
☀️ Radiation
Thermal radiation is electromagnetic radiation emitted by matter because of its temperature.
📏 Effect of Distance
For an ideal point source spreading energy uniformly, intensity decreases with the square of distance.
1 m → 2 m
Relative intensity becomes approximately:
1/4
📝 Procedure
- Select Conduction, Convection or Radiation.
- Set the experimental controls.
- Switch the heat source ON.
- Observe the visual heat transfer.
- Read the temperature or intensity values.
- Change one variable at a time.
- Compare the new result.
- Record important observations.
- Repeat using different settings.
- Compare all three heat-transfer methods.
💡 Remember
🎓 Quick Viva Questions
1. What is conduction?
Conduction is thermal-energy transfer through microscopic interactions within matter, without bulk motion of the material.
2. Which materials are usually good thermal conductors?
Many metals are good thermal conductors. Copper and aluminium are common examples.
3. Why does warm water rise during convection?
Heating generally lowers the density of a region of water, so the warmer region tends to rise while cooler, denser water tends to sink.
4. Can radiation travel through a vacuum?
Yes. Electromagnetic radiation can transfer energy through a vacuum.
5. How does distance affect radiation intensity?
For an ideal point source, intensity follows an inverse-square relationship with distance.
6. Which heat-transfer method brings energy from the Sun to Earth?
Radiation.
✅ Experiment Result
Heat can be transferred by conduction, convection and radiation. Conduction transfers thermal energy through matter, convection transports energy through fluid motion, and radiation transfers energy through electromagnetic waves.