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Both calculators run independently — change the inputs on either side to compare results.
Chemical Engineering
LMTD Heat Exchanger Calculator
Compute the log mean temperature difference (LMTD) — the effective driving force for heat transfer in a heat exchanger, given the four end-of-fluid temperatures. The standard input to the design equation Q = U·A·LMTD for sizing or rating exchangers.
Chemical Engineering
Reynolds Number Calculator
Compute the Reynolds number Re = ρvD/μ — the dimensionless ratio of inertial to viscous forces in a flowing fluid. The single most important number for predicting laminar vs turbulent flow in pipes, channels, and around objects.
Key differences
| LMTD Heat Exchanger Calculator | Reynolds Number Calculator | |
|---|---|---|
| Category | Chemical Engineering | Chemical Engineering |
| Inputs required | 4 | 4 |
| Result | LMTD (°C) | Reynolds Number |
| What it does | Compute the log mean temperature difference (LMTD) — the effective driving force for heat transfer in a heat exchanger, given the four end-of-fluid temperatures. The standard input to the design equation Q = U·A·LMTD for sizing or rating exchangers. | Compute the Reynolds number Re = ρvD/μ — the dimensionless ratio of inertial to viscous forces in a flowing fluid. The single most important number for predicting laminar vs turbulent flow in pipes, channels, and around objects. |