Building Blocks of Simulation

Modular Design

A key principle is modularity: breaking down a complex system into smaller, independent modules or components. Each module should perform a specific task and interact with others through well-defined interfaces.

This approach simplifies development, testing, and maintenance. Changes to one module are less likely to affect the entire simulation.

Control Flow Mechanisms

The order in which modules execute is governed by control flow. Common mechanisms include sequential execution, conditional branching (if/else statements), and loops.

Careful design of the control flow ensures that events occur in a realistic sequence within the simulated system.

Sequential Execution: Module A -> Module B -> Module C

Data Representation

Simulations require representing physical quantities – position, velocity, force, etc. Choosing an appropriate data representation is crucial for accuracy and efficiency.

Common representations include scalars (single values), vectors (magnitude and direction), and matrices (multi-dimensional arrays). Dimensionality must be carefully considered.

Vector: v = (vx, vy, vz)

System Coupling

Modules are connected through defined interfaces. The strength of these connections—how much one module’s state impacts another—determines the system coupling.

High coupling means changes in one area can ripple across the entire simulation, while low coupling provides more isolated and manageable behavior.

Frequently asked questions

Try it live

Everything above runs in your browser — open SPH Fluid and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.