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title: "Grid"
canonical: "https://documentation.chaos.com/space/PHX4MAYA/125768309/Grid"
format: markdown
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This page provides information on the Grid rollout.

## **Overview**

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> The Grid rollout lets you set the boundaries, size and resolution quality of the sim. Regarding size, the Phoenix Simulator works best when the scale of the container matches the real-world size of the simulated effect. For example, if you are simulating a campfire, your container should be at most a couple of meters wide.
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> Note that it does not matter if this is two meters or two thousand millimeters - the way you view the units is irrelevant. Phoenix always converts the units to a common world-size length, so the only important thing is the size of the container. If you are simulating a volcano, for example, the container should be several hundred meters wide, or several hundred thousand millimeters.
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> Using the parameters on this rollout you can:
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> - Specify the **Size** and **Resolution** of the Simulator
> - Enable / Disable **Adaptive Grid** which is a performance optimization allowing you to keep the size of the Simulator as small as possible thus reducing RAM usage
> - Specify which **Walls** of the Simulator will be considered **Open** (infinite) or **Jammed** (ie. as solid obstacles, closed)
> - Link multiple Simulators in a **Cascade** setup - for more information, please check the following article: [Transferring fluid between Simulators using a Cascade Connection](https://docs-chaos.atlassian.net/wiki/spaces/PHX4MAYA/pages/125634081/Interactions+Between+Simulators#cascadeConnection).
> - Specify a **Confine Geometry** to limit the fluid calculations only to the volume of the specified object

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> UI Path: ||Select [PhoenixFDSim](https://docs-chaos.atlassian.net/wiki/spaces/PHX4MAYA/pages/125895496)|| **> Attribute Editor > Grid rollout**

##   
**Parameters**

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### Example: Scene Scale

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> The following video provides examples to show the differences of **Scene Scale***** ***with values of* 0.1*, *5.0* and 15.0.

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### Example: Grid Resolution

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> The following video provides examples to show the differences when the Total cells from the **Grid's Resolution** is at *570,000*, *4,000,000*and *16,000,000*.

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### Example: Setting up a 2D Simulation

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> A 2D Simulation can be performed by adjusting the Grid dimensions such that either **X Size**, **Y Size**, or **Z Size** is set to 1. The main application of this feature is to create very wide fires that would otherwise be time-consuming with a 3D simulation, like the image below.
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> To keep features like the embedded gravity and pressure decay, it is recommended to leave the Y direction active and set the X or Z size to 1.


![image](media://b9917a28-cfee-4ae5-9eb7-842c349968ca)



### **Container Walls**

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### **Geometry Connections**

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### **Grid Adaptation**

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### **Manual Adaptation Limits**

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