Free Engineering Simulation Tutorial - Opensource Software & Simulation Guides

Tightening a bolt isn't really about torque — it's about the invisible tension you create inside it. That tension, the preload or clamp force, is what actually holds a joint together, resists vibration and prevents fatigue failure. Torque is just the means to get there, linked to preload by one deceptively simple equation: T = K · D · F . This free Bolt Torque & Preload Calculator turns a target clamp load into the tightening torque you need — for any metric bolt grade, diameter and lubrication — and checks the bolt stress against its proof and yield strength. Figure 1 Bolt Torque and Preload Calculator Table of Contents The Bolt Torque Calculator The T = K D F Equation Preload & Clamp Force The Nut Factor (K) Why Lubrication Matters Bolt Grades & Stress Area Worked Example Common Mistakes FAQ The Bolt Torque & Preload Calculator Pick a metric bolt size and grade, choose a target preload (% o...

Speed a fluid up and its pressure falls; slow it down and its pressure rises. That simple, almost counter-intuitive trade-off is the heart of the Bernoulli equation — the single most useful relationship in fluid mechanics. It links pressure, velocity and elevation between any two points along a streamline, and it explains everything from how a venturi meter works to why an aircraft wing lifts. This free Bernoulli Equation Calculator solves for the unknown pressure, velocity or height between two points, with an optional head-loss term for real, frictional flow. Table of Contents The Bernoulli Calculator The Bernoulli Equation Understanding Head Assumptions & Limits Adding Head Loss Real-World Uses Worked Example Common Mistakes FAQ The Bernoulli Equation Calculator Enter the known values at point 1 and point 2, choose what to solve for, and add head loss if the flow has friction. Consistent SI units (Pa, m/s, m)...

Water Hammer Calculator - Joukowsky Surge Pressure (Free) Free Engineering Calculator · Water Hammer · Surge Pressure · Joukowsky Equation · Pipe Flow Need to estimate water hammer or surge pressure in a pipeline? This free Water Hammer Calculator uses the Joukowsky equation to estimate the pressure rise caused by a rapid change in liquid velocity. Enter fluid density, pressure-wave speed and velocity change to calculate surge pressure, hydraulic head rise and estimated final pressure. Water hammer can occur when a flowing liquid is accelerated or decelerated rapidly. A fast valve closure, pump trip, check-valve action, emergency shutdown or sudden change in flow can generate a pressure wave that travels through the pipe. In a long pipeline, that transient event can produce a pressure rise far above normal operating pressure. Figure 1 Water hammer or Surge Pressure Calculator FREE WATER HAMMER TOOL Estimate Joukowsky Surge Pressure in Seconds Use the calculator for a fir...

Valve Cv / Kv Flow Coefficient Calculator - Size Control Valves Free Engineering Calculator · Control Valve Sizing · Flow Coefficient · Pressure Drop · Liquid Service Need to size a control valve from flow rate and pressure drop? This free Valve Cv / Kv Flow Coefficient Calculator helps engineers estimate the required liquid flow coefficient and convert between Cv and Kv. Enter the required flow, valve pressure drop and specific gravity, then use the result as a preliminary sizing check before selecting a real control valve. For a liquid control-valve application, the flow coefficient connects three practical design quantities: flow rate, pressure drop and fluid density relative to water . That makes Cv and Kv useful when comparing valve sizes, checking whether a selected valve has enough capacity, or moving between valve data expressed in US and metric conventions. Figure 1 Cv and Kv Calculator FREE LIQUID VALVE SIZING TOOL Calculate Cv or Kv from Flow and Pressure ...