This calculator helps estimate the rate of evaporation for a given surface area, temperature difference, and air humidity. Evaporation is the process by which water changes from a liquid to a gas or vapor. The rate at which this occurs is influenced by several factors, including temperature, surface area, air movement, and the humidity of the surrounding air.
function calculateEvaporation() {
var surfaceArea = parseFloat(document.getElementById("surfaceArea").value);
var temperatureDifference = parseFloat(document.getElementById("temperatureDifference").value);
var humidity = parseFloat(document.getElementById("humidity").value);
var windSpeed = parseFloat(document.getElementById("windSpeed").value);
var resultElement = document.getElementById("result");
resultElement.innerHTML = ""; // Clear previous results
if (isNaN(surfaceArea) || isNaN(temperatureDifference) || isNaN(humidity) || isNaN(windSpeed)) {
resultElement.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (surfaceArea <= 0 || temperatureDifference < 0 || humidity 100 || windSpeed < 0) {
resultElement.innerHTML = "Please enter valid input values. Surface area and wind speed must be positive. Temperature difference must be non-negative. Humidity must be between 0 and 100.";
return;
}
// A simplified empirical formula for estimating evaporation rate.
// This is a basic model and actual evaporation can be more complex.
// Rate = (Surface Area * Temperature Difference * (1 – Humidity/100) * Wind Speed Factor)
// Wind speed factor is a simplified representation, often non-linear in reality.
// Here we use a linear approximation for simplicity.
var windSpeedFactor = 0.1 * windSpeed; // Arbitrary factor to represent wind's effect
var evaporationRate = surfaceArea * temperatureDifference * (1 – (humidity / 100)) * windSpeedFactor;
// Ensure the rate is not negative due to extreme humidity or temperature inputs
if (evaporationRate < 0) {
evaporationRate = 0;
}
resultElement.innerHTML = "