[discoed89]

Hi everyone,

I’m working on a **vortex simulation inside a jug for frothing** using **ANSYS Discovery**, and I’m struggling with the **Rotating Fluid Zone setup**. I’ve run into multiple errors, and I need **step-by-step guidance** to resolve them.

### **🚨 Errors I'm Facing in ANSYS Discovery:**

1️⃣ **"Rotating Fluid Zone Wall must be placed on faces with co-linear centers."**
- I believe this means my **rotation axis is misaligned**, but I don’t know how to check or adjust it properly in **Discovery Geometry or Setup**.

2️⃣ **"Motion for Rotating Fluid Zone Wall on cylindrical walls must have parallel axial directions."**
- I assume this means the **rotation axis isn't correctly defined**, but I don’t know where to verify or fix this in Discovery.

3️⃣ **"Motion for Rotating Fluid Zone Wall on planar walls must be aligned with plane normals."**
- It seems Discovery doesn’t allow rotation on **flat surfaces**, but I’m unsure how to define the right motion constraints.

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### **🔹 My Current Setup & What I’ve Tried:**
✅ **Software:** ANSYS Discovery (2024 R2)
✅ **Project:** Simulating vortex formation inside a jug used for **frothing**
✅ **Geometry:** Created in **Discovery Geometry**, sent to **Physics Setup**
✅ **Fluid Volume Extraction:** Used **Volume Extract** to isolate the internal flow region
✅ **Rotating Fluid Zone:** Defined in **Physics Setup**
✅ **Moving Wall Boundary Conditions:** Assigned to the inner walls
✅ **Rotation Axis:** Checked in Discovery, but still getting errors

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### **🔹 What I Need Help With:**
🔹 **Step-by-step troubleshooting** for these errors
🔹 How to **check and correct rotation axis alignment** in Discovery
🔹 How to properly assign **rotating wall boundaries** for a vortex simulation inside a **sealed jug**
🔹 Recommended **Discovery Physics settings** for **rotating liquid flow in an enclosed volume**

If anyone has experience with **vortex simulations in ANSYS Discovery**, especially for **frothing applications**, I’d love to hear your advice! 🚀

Would really appreciate any help! Thanks in advance! 🙏