Home
Back
Mass Density of Fluid Formula:
| From: | To: |
Mass Density of Fluid (ρf) is the mass per unit volume of a fluid. It represents how much mass is contained in a given volume of the fluid and is a fundamental property in fluid mechanics and thermodynamics.
The calculator uses the formula:
Where:
Explanation: This formula relates the mass density of a fluid to its dynamic and kinematic viscosities. Kinematic viscosity is defined as dynamic viscosity divided by mass density.
Details: Mass density is crucial for various engineering applications including fluid flow calculations, buoyancy analysis, heat transfer calculations, and designing hydraulic systems. It helps determine how fluids behave under different conditions.
Tips: Enter dynamic viscosity in Pascal-seconds (Pa·s) and kinematic viscosity in square meters per second (m²/s). Both values must be positive numbers greater than zero.
Q1: What is the difference between dynamic and kinematic viscosity?
A: Dynamic viscosity measures a fluid's resistance to flow under an applied force, while kinematic viscosity is the ratio of dynamic viscosity to mass density and represents the fluid's resistance to flow under gravitational forces.
Q2: What are typical units for mass density?
A: Mass density is typically measured in kilograms per cubic meter (kg/m³) in the SI system, or grams per cubic centimeter (g/cm³) in other systems.
Q3: How does temperature affect mass density?
A: For most fluids, mass density decreases as temperature increases due to thermal expansion. Water is an exception between 0-4°C where it becomes denser as it warms.
Q4: What is the mass density of water at room temperature?
A: Pure water has a mass density of approximately 1000 kg/m³ at 4°C, and about 998 kg/m³ at 20°C.
Q5: Can this formula be used for all types of fluids?
A: This formula is valid for Newtonian fluids where viscosity is constant regardless of the applied stress. For non-Newtonian fluids, the relationship may be more complex.