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Fluid Mechanics Calculators & Tools

Fluid mechanics calculators for pipe pressure drop, hydraulic cylinders, and pump sizing. Design efficient fluid systems with accurate flow and pressure calculations.

Fluid Mechanics Calculators

Explore our collection of 5 fluids engineering calculators. Each tool includes detailed documentation, formulas, and interactive visualizations.

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Pipe Pressure Drop Calculator
Calculate pressure drop in straight pipes using the Darcy-Weisbach equation. Determine flow regime, friction factor, and head loss.
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Hydraulic Cylinder Calculator
Calculate force, pressure, and flow requirements for hydraulic cylinders. Size cylinders for extend and retract operations.
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Pump Sizing Calculator
Calculate pump power requirements, total dynamic head, and motor sizing. Determine pump type based on specific speed and NPSH availability.
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Tank Volume Calculator
Calculate storage tank capacity for cylindrical, rectangular, and spherical tanks. Supports partial fill calculations with liquid weight estimation and 3D visualization.
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Orifice Flow Calculator
Calculate flow rate, orifice size, or pressure drop for orifice plate flow meters using ISO 5167 principles. Includes animated 3D visualization of flow through the orifice.

Fluid Mechanics Glossary

Key terms and definitions for fluids engineering. Understanding these concepts will help you use our calculators more effectively.

Reynolds Number
A dimensionless quantity that predicts flow patterns. Defined as Re = ρVD/μ, it indicates whether flow is laminar (Re < 2300), transitional, or turbulent (Re > 4000).
Friction Factor (Darcy)
A dimensionless number used in the Darcy-Weisbach equation to calculate pressure drop. Depends on Reynolds number and pipe relative roughness.
Darcy-Weisbach Equation
An empirical equation for calculating pressure loss in pipes: ΔP = f·(L/D)·(ρV²/2). It accounts for pipe length, diameter, fluid properties, and flow regime.
Bore Diameter
The inner diameter of a hydraulic cylinder barrel, which defines the piston area. The bore area determines the extend (push) force: F = P × A_bore. Larger bore diameters provide more force at the same pressure.
Annular Area
The effective piston area on the rod side of a hydraulic cylinder, calculated as A_annular = A_bore - A_rod. This area determines retract (pull) force and flow requirements for retraction.
Stroke Length
The distance a hydraulic cylinder piston can travel from fully retracted to fully extended position. Stroke length determines the volume of fluid required for each cycle and affects rod buckling calculations.
Total Dynamic Head (TDH)
The total equivalent height a pump must overcome, including static head (elevation), friction head (pipe losses), pressure head (tank pressure), and velocity head. Determines pump operating point.
System Curve
A graph showing the relationship between head and flow rate for a piping system. The curve rises parabolically because friction losses increase with the square of flow rate: H = Hs + KQ².
NPSH (Net Positive Suction Head)
The absolute pressure at the pump inlet above vapor pressure, expressed as head. NPSHa (available) must exceed NPSHr (required by pump) to prevent cavitation. NPSHa = Ha - Hvp - Hf - Hs.
Tank Capacity
The total volume a tank can hold when completely filled, typically measured in gallons, liters, or cubic feet. Capacity depends on tank geometry (cylindrical, rectangular, spherical) and internal dimensions.
Partial Fill Volume
The volume of liquid in a partially filled tank. For vertical tanks, partial fill is proportional to height. For horizontal cylinders and spheres, partial fill requires segment or cap formulas due to the curved geometry.
Tank Head Types
The end closure designs for cylindrical tanks. Common types include flat (flanged or welded), hemispherical (half-sphere), 2:1 elliptical (most common pressure vessel), torispherical (dished with knuckle radius), and conical (for drainage).

Frequently Asked Questions

What are fluid mechanics calculators?

Fluid Mechanics calculators are online tools that help engineers and students solve common fluids engineering problems. They provide quick, accurate calculations for design, analysis, and verification tasks.

Are these fluids calculators free to use?

Yes, all fluid mechanics calculators on Simulyzers are completely free to use. No registration or account is required.

How accurate are these fluids engineering tools?

Our calculators use industry-standard formulas and methods. However, they are intended for preliminary estimates and educational purposes. Always verify critical calculations with a qualified professional engineer.

Can I use these calculators on mobile devices?

Yes, all our fluids engineering calculators are fully responsive and work on smartphones, tablets, and desktop computers.

Other Categories

🏗️ Structural Engineering⚡ Electrical Engineering⚙️ Mechanical Engineering🏭 Manufacturing & Production🌡️ Heat Transfer & Thermal

About Fluid Mechanics Tools

Our fluids engineering calculators are designed for practicing engineers, students, and technical professionals. Each calculator uses established engineering formulas with clear documentation of assumptions and limitations.

How to Use These Calculators

  • Enter your input values in the form fields
  • Select appropriate units (metric or imperial)
  • Click Calculate to see results
  • Review any warnings or notes about assumptions
  • Use the 3D visualization to verify your understanding
  • Share calculations by copying the URL

Disclaimer

These calculators are for preliminary estimates and educational purposes only. Results should be verified by a qualified professional engineer before use in actual engineering applications. See our full disclaimer for more information.