Fluid Mechanics Calculator

Stagnation pressure (P0​) is a thermodynamic property of a fluid flow representing the total pressure at a point where the fluid velocity is reduced to zero (stagnation point). It accounts for both static pressure and dynamic pressure present in the fluid flow. Stagnation pressure is the total pressure of a fluid at a stagnation point, […]

The hydraulic diameter of a non-circular conduit is defined as four times the cross-sectional area divided by the wetted perimeter. It represents an equivalent diameter of a circular conduit that would have the same flow resistance as the non-circular conduit. The hydraulic diameter (Dh​) is typically expressed in meters (m). The formula for calculating the

Thermal conductivity is defined as the amount of heat energy transferred per unit area per unit time through a unit thickness of a material, for a temperature gradient of one degree Celsius (or Kelvin) per unit length. The SI unit of thermal conductivity is Watt per meter-kelvin (W/(m·K)). The formula for thermal conductivity (k) is

Specific Heat Capacity, often denoted as C​, is a measure of the amount of heat energy required to raise the temperature of a unit mass of a substance by one degree Celsius (or Kelvin). It quantifies the ability of a material to store thermal energy. The SI unit of Specific Heat Capacity is Joule per

The Aspect Ratio is a dimensionless parameter commonly used in fluid mechanics to describe the geometric shape of an object or a flow domain, particularly in the context of channels, ducts, or pipes. It quantifies the ratio of the width of the flow channel to its height or diameter. The Aspect Ratio is defined as

The Peclet Number (Pe) is a dimensionless parameter used in fluid mechanics to characterize the ratio of convective to diffusive mass transfer in a fluid flow. It helps in understanding the dominance of convective or diffusive transport processes. The Peclet Number is defined as the ratio of convective mass transfer rate to diffusive mass transfer

The Prandtl Number (Pr) is a dimensionless parameter used in fluid mechanics to characterize the ratio of momentum diffusivity to thermal diffusivity in a fluid. It provides information about the relative rates of momentum and heat transfer within the fluid. The Prandtl Number is defined as the ratio of momentum diffusivity (kinematic viscosity) to thermal

Euler’s Number (Eu) is a dimensionless parameter used in fluid mechanics to characterize the ratio of inertial forces to pressure forces in a fluid flow. It helps understand the relative importance of these forces in determining the behavior of the fluid flow. Euler’s Number is defined as the ratio of pressure to the kinetic energy

The Nusselt number (Nu) is a dimensionless number used to characterize the ratio of convective to conductive heat transfer across a fluid boundary layer. It provides insight into the efficiency of convective heat transfer compared to conductive heat transfer. The Nusselt number is defined as the ratio of convective heat transfer to conductive heat transfer

Strain rate (˙ε˙) is a measure of the rate at which deformation occurs in a fluid flow. It quantifies how quickly the fluid is being deformed or sheared as it flows. Strain rate is defined as the rate of change of velocity gradient within a fluid. The SI unit of strain rate is per second