This calculator helps you determine the volumetric flow rate of a gas based on its pressure, temperature, and velocity, or by using common engineering units.
function calculateGasFlowRate() {
var pressure = parseFloat(document.getElementById("pressure").value);
var temperature = parseFloat(document.getElementById("temperature").value);
var velocity = parseFloat(document.getElementById("velocity").value);
var area = parseFloat(document.getElementById("area").value);
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = ""; // Clear previous results
if (isNaN(pressure) || isNaN(temperature) || isNaN(velocity) || isNaN(area)) {
resultDiv.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (temperature <= 0) {
resultDiv.innerHTML = "Temperature must be greater than 0 Kelvin.";
return;
}
if (area <= 0) {
resultDiv.innerHTML = "Cross-sectional area must be greater than 0.";
return;
}
// Basic volumetric flow rate calculation: Q = A * v
var volumetricFlowRate = area * velocity;
// Displaying the result in m³/s
resultDiv.innerHTML = "Calculated Volumetric Flow Rate: " + volumetricFlowRate.toFixed(4) + " m³/s";
// Advanced calculations (e.g., using ideal gas law) could be added here if needed,
// but for a basic calculator, Q = Av is standard.
// Example: If you wanted to convert to standard conditions (STP), you'd need
// the gas constant (R), molar mass, and potentially be given mass flow rate.
// For simplicity, we focus on direct volumetric flow rate from velocity and area.
}
.gas-flow-calculator {
font-family: Arial, sans-serif;
border: 1px solid #ddd;
padding: 20px;
border-radius: 8px;
max-width: 600px;
margin: 20px auto;
background-color: #f9f9f9;
}
.gas-flow-calculator h2 {
text-align: center;
color: #333;
margin-bottom: 20px;
}
.gas-flow-calculator p {
color: #555;
line-height: 1.6;
}
.inputs {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
gap: 15px;
margin-bottom: 20px;
}
.form-group {
display: flex;
flex-direction: column;
}
.form-group label {
margin-bottom: 5px;
font-weight: bold;
color: #444;
}
.form-group input[type="number"] {
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1em;
width: 100%;
box-sizing: border-box;
}
.gas-flow-calculator button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1em;
cursor: pointer;
transition: background-color 0.3s ease;
}
.gas-flow-calculator button:hover {
background-color: #45a049;
}
.result {
margin-top: 25px;
padding: 15px;
background-color: #e7f3fe;
border-left: 6px solid #2196F3;
border-radius: 4px;
}
.result p {
margin: 0;
font-size: 1.1em;
text-align: center;
}
.result .highlight {
font-weight: bold;
color: #2196F3;
}