# Vicena

> Vicena is an AI workspace for real science. It helps scientists and engineers move from a research question to inspectable simulations, analysis, notebooks, and evidence.

Canonical site: https://vicena.ai/

## Open Research Twins

- [Open Research Twin Starters — English](https://vicena.ai/research-twins): Open scientific projects with working models, example inputs, checks, notebooks, and instructions for adapting them to a new research question.
- [开放研究孪生起始项目 — 简体中文](https://vicena.ai/zh-CN/research-twins): 面向电池、成像、分子研发、能源系统、过程工程和设备研究的开放科研起始项目。
- [Gemelos de investigación abiertos — Español](https://vicena.ai/es/research-twins): Puntos de partida científicos ejecutables y de código abierto para adaptar a datos y sistemas reales.

The catalogue includes battery research, fluorescence imaging, small-molecule lead optimization, photovoltaic systems, chemical reactors, building energy and HVAC, wind turbines, industrial predictive maintenance, and reaction-mechanism analysis. Each primary action asks Vicena to set up the open project, explain what it contains, run its working example and checks, and gather only the information needed to adapt it.

## CFD and aerodynamics

- [CFD & Aerodynamics — English](https://vicena.ai/cfd-aerodynamics): Geometry audit and repair, meshing, OpenFOAM and SU2 computation, quality gates, pressure and velocity fields, force analysis, and reproducible artifacts.
- [CFD 与空气动力学 — 简体中文](https://vicena.ai/zh-CN/cfd-aerodynamics): 中文版 CFD 与空气动力学应用页面。
- [CFD y aerodinámica — Español](https://vicena.ai/es/cfd-aerodynamics): Página en español de la aplicación de CFD y aerodinámica.
- [Download the Al Rihla CFD reproducibility package](https://vicena.ai/downloads/al-rihla-cfd-reproducibility-package-v1.zip): Executed notebook, attributed repaired STL, validation records, repair scripts, OpenFOAM cases, Vicena Compute submission templates, compact force histories, and field data.
- [Package SHA-256 checksum](https://vicena.ai/downloads/al-rihla-cfd-reproducibility-package-v1.zip.sha256)

The CFD application page documents a real workflow that starts with an imperfect 3D-printing mesh, repairs and validates the surface, builds and checks volume meshes, establishes stationary and rotating baselines, and progresses to time-resolved URANS analysis. The page clearly separates exploratory evidence from validated scientific conclusions.

## Optical simulation

- [Optical Simulation — English](https://vicena.ai/optical-simulation): GPU MCX light transport through layered tissue, three-dimensional fluence, depth attenuation, lateral spread, sensor-design interpretation, and explicit model boundaries.
- [光学模拟 — 简体中文](https://vicena.ai/zh-CN/optical-simulation): 中文版光学模拟与光子学应用页面。
- [Simulación óptica — Español](https://vicena.ai/es/optical-simulation): Página en español de simulación óptica y fotónica.

The optical application page is based on an executed 850 nm pmcx/MCX study with one million photon histories on a managed RTX 4090. It distinguishes simulated fluence from a calibrated detector signal and keeps tissue properties, voxel size, random seed, and engine provenance visible.

## Semiconductor R&D and open-source chip design

- [Semiconductor R&D & Design — English](https://vicena.ai/semiconductor-chip-design): One workspace for literature, patents, materials, lithography, metrology, experiment planning, device physics, circuits, RTL, synthesis, and public-PDK design.
- [半导体研发与设计 — 简体中文](https://vicena.ai/zh-CN/semiconductor-chip-design): 中文版半导体研发与开源芯片设计应用页面。
- [I+D y diseño de semiconductores — Español](https://vicena.ai/es/semiconductor-chip-design): Página en español de I+D de semiconductores y diseño abierto de chips.

The unified page connects broad R&D workflows—literature, materials, lithography, wafer metrology, defects, and experiment planning—to device, circuit, RTL, synthesis, and public-PDK implementation layers. Its executed chip example documents managed job lca3fe665ef84a8617eb71ce8b3b61df0f: Verilator 5.032 passed lint, Yosys 0.52 completed with zero check problems, and the real netlist retained all 16 processing elements. Technology-independent cell counts are not presented as physical area, timing, power, layout, or manufacturability.

## Circuit design and analog AI

- [Circuit Design — English](https://vicena.ai/circuit-design): A four-input, three-class differential resistive-crossbar classifier with a managed ngspice transient run, score verification, decision margins, and analytical robustness and energy studies.
- [电路设计与模拟 AI — 简体中文](https://vicena.ai/zh-CN/circuit-design): 中文版电路设计、模拟与模拟 AI 应用页面。
- [Diseño de circuitos e IA analógica — Español](https://vicena.ai/es/circuit-design): Página en español de diseño de circuitos e IA analógica.

The circuit-design application page documents managed job lcb1d06dbeca9daa83bb2f31da3c20d3b1 using ngspice 45.2. All six transient input patterns selected the expected class, with a minimum simulated decision margin of 359.75 mV. The page labels the architecture as a proof of concept, not a transistor-level or tapeout-ready chip.

## Other public applications

- [Chemistry](https://vicena.ai/chemistry)
- [Computational chemistry and molecular dynamics](https://vicena.ai/computational-chemistry): Rowan-managed workflows and their named scientific engines, including AIMNet2/fairchem, xTB/CREST, PySCF/GPU4PySCF, Psi4, Quantum ESPRESSO, OpenFold3, Boltz, Chai-1r, ColabFold/MMseqs2, OpenMM/OpenFF, Vina-family docking, TMD free-energy perturbation, geomeTRIC/Sella/ASE optimization, and RDKit preparation and analysis.
- [Scientific simulations](https://vicena.ai/science-computer): A visual hub linking the CFD and aerodynamics, optical simulation, semiconductor R&D and design, circuit design, and computational chemistry and molecular dynamics application workflows.
- [Protocol design](https://vicena.ai/protocol-design)
- [Scientific tools and simulation fields](https://vicena.ai/tools): a server-rendered catalog with first-class CFD and aerodynamics, optical simulation, semiconductor design, circuit design, and computational chemistry and molecular dynamics fields. Each field names its managed packages and links to its application page. Packages include OpenFOAM, SU2, MCX/pmcx, Meep, MPB, Mitsuba, ngspice, Yosys, OpenROAD, DEVSIM, Rowan, OpenFold3, OpenMM, and related scientific software.
- [Workspace](https://vicena.ai/workspace)

## Discovery

- [XML sitemap](https://vicena.ai/sitemap.xml): Canonical English, Simplified Chinese, and Spanish public URLs with reciprocal hreflang alternates.
- [Crawler policy](https://vicena.ai/robots.txt)

Public application pages are server-rendered and prerendered, so their essential text, links, metadata, and structured data do not depend on client-side JavaScript.