High-Rise Building (CAARC)
**************************

.. html metadata
.. meta::
   :description: High-Rise Building (CAARC)
   :keywords: Digital Wind Tunnel, Validation, CAARC

.. Public Project
.. ==============
.. .. link to insight page
.. `AeroSim Web App`_

.. .. _AeroSim Web App: https://insight.aerosim.io/cp/TODEFINE/


.. animations, surfaces and contours
.. figure_expand:: /_static/caarc/visuals_1.png
   :alt: Urban Center
   :figwidth: 100%
   :align: center

1. Project Description
======================

The CAARC building is widely recognized as a standard calibration geometry for wind tunnel testing. 
It is a rectangular prismatic model with dimensions of 30 × 45 × 180 meters. 
The CAARC model is extensively used for calibrating pressure coefficient measurements and validating dynamic analysis methodologies across different laboratories. 
In 2007, during the 12th International Conference on Wind Engineering (ICWE12), standardized dynamic parameters for the `CAARC_Building`_ were established. 
Comparative results from various laboratories are available in :footcite:p:`holmes2014international`.

.. _CAARC_Building: https://iawe.org/committees/HFBB-spec.pdf
.. Cite experimental database or paper

.. footbibliography::

The velocities were measured at an equivalent height :math:`H=180m`. The wind directions chosen to be simulated were:

.. list of analyzed cases
.. csv-table:: Wind Directions
   :file: /_static/caarc/cases.csv
   :widths: 20, 20, 20, 20, 20
   :header-rows: 0


2. Simulation Setup
===================

The Synthetic Eddy Method (SEM) boundary condition is applied at the inlet of the computational domain.
Solid fins are distributed across the floor to ensure the desired velocity and turbulence profiles during flow development length.
A Neumann boundary condition is applied at the remaining boundaries.
The grid resolution for the atmospheric profile is set such that :math:`H / \Delta x = 480` at finest refinement level, and :math:`H / \Delta x = 120` for the ABL refinement.


3. Results: Wind Loads
======================

Wind loads are evaluated using both static and dynamic analyses, with the results compared against experimental data obtained from wind tunnel testing.

Static Loads
------------

.. figure_expand:: /_static/caarc/static_xi0.01.svg
  :alt: Static Load
  :figwidth: 100%
  :align: center


Dynamic Loads (damping 1.0%)
----------------------------

.. figure_expand:: /_static/caarc/static_eq_xi0.01.svg
  :alt: Static Load
  :figwidth: 100%
  :align: center

Dynamic Loads (damping 2.5%)
----------------------------

.. figure_expand:: /_static/caarc/static_eq_xi0.025.svg
  :alt: Static Load
  :figwidth: 100%
  :align: center

Acceleration (damping 1.0%)
---------------------------

.. figure_expand:: /_static/caarc/acc_xi0.01.svg
  :alt: Static Load
  :figwidth: 100%
  :align: center

Acceleration (damping 2.5%)
---------------------------

.. figure_expand:: /_static/caarc/acc_xi0.025.svg
  :alt: Static Load
  :figwidth: 100%
  :align: center

4. Results: Performance Benchmark
=================================

We also use the CAARC building as a reference case to assess the software’s performance, comparing processing times with those reported in other studies from the literature. Although these studies are not necessarily focused on performance evaluation, they offer a useful benchmark for comparison.

.. list of analyzed cases
.. csv-table:: Performance Benchmark
   :file: /_static/caarc/benchmark.csv
   :widths: 20, 20, 20, 20, 20
   :header-rows: 0

**SSPSH:** seconds simulated per simulation hours

.. footbibliography::

Changelog
=========

* **20 Jun 2025**: Added case to portfolio