Convection Calculator (Newton’s Cooling Q=hAΔT)
Compute convective heat transfer between a solid surface and a fluid via Newton’s law of cooling Q = h·A·(Ts − T∞), covering common natural/forced convection coefficients.
Key points
Convection Calculator (Newton’s Cooling Q=hAΔT): Compute convective heat transfer between a solid surface and a fluid via Newton’s law of cooling Q = h·A·(Ts − T∞), covering common natural/forced convection coefficients. Formula: Q = h·A·(Ts − T∞). Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Newton's law of cooling: Q = h·A·(Ts − T∞), where h is the convection coefficient depending on flow regime and fluid properties. Typical h (W/(m²·K)): natural air 5–25, forced air 25–250, water 500–10000.
Inputs
Q = h·A·(Ts − T∞)Calculation model (updates with parameters)
| Convective heat flow Q | 275 W | Q = h·A·(Ts − T∞); positive means the surface rejects heat to the fluid |
| Heat flux per unit area | 550 W/m²W/m² | |
| Convection resistance | 200 mK/WK/W | R = 1/(h·A) |
| Temperature difference ΔT | 55K |
Engineering notes
- Newton's law of cooling: Q = h·A·(Ts − T∞), where h is the convection coefficient depending on flow regime and fluid properties.
- Typical h (W/(m²·K)): natural air 5–25, forced air 25–250, water 500–10000.
- Heat sink sizing often uses this: given allowable temperature rise and h, the required area is A = Q/(h·ΔT).
FAQ
- What is Convection Calculator (Newton’s Cooling Q=hAΔT) for?
- Compute convective heat transfer between a solid surface and a fluid via Newton’s law of cooling Q = h·A·(Ts − T∞), covering common natural/forced convection coefficients.
- What is the formula for Convection Calculator (Newton’s Cooling Q=hAΔT)?
- Core formula: Q = h·A·(Ts − T∞). The tool returns results instantly using this formula and the selected parameters.
- What engineering notes should I keep in mind when using Convection Calculator (Newton’s Cooling Q=hAΔT)?
- Newton's law of cooling: Q = h·A·(Ts − T∞), where h is the convection coefficient depending on flow regime and fluid properties. Typical h (W/(m²·K)): natural air 5–25, forced air 25–250, water 500–10000. Heat sink sizing often uses this: given allowable temperature rise and h, the required area is A = Q/(h·ΔT).