# Kwikraft — CFD Engineering & 3D Printing Services

> Kwikraft is an engineering consultancy specializing in Computational Fluid Dynamics (CFD) simulations and professional 3D printing services. We deliver validated fluid flow analyses using OpenFOAM across biomedical, automotive, marine, HVAC, and sports engineering sectors, alongside precision additive manufacturing for industrial, scientific, and custom applications.

## Services

- [CFD Simulation Services](https://kwikraft.com/contact): Custom fluid dynamics analysis using OpenFOAM — steady-state RANS, transient compressible flow, moving mesh, FSI, and species transport simulations.
- [3D Printing Services](https://kwikraft.com/3d-printing): Precision additive manufacturing in engineering-grade polymers (ABS, PETG, CF-PETG, PLA, CF Nylon). Insert molding, batch production, and reverse engineering from 3D scans.
- [About](https://kwikraft.com/about): Engineering background and service philosophy.
- [Contact](https://kwikraft.com/contact): Consultation request form for CFD projects.

## CFD Case Studies

- [Port-a-Cath Device Flow Analysis](https://kwikraft.com/case-studies/port-a-cath-simulation): Steady-state laminar flow simulation (OpenFOAM, Bird-Carreau non-Newtonian model) of blood flow in the vena cava around an implanted Port-a-Cath catheter. 200k mesh elements. Identified recirculation zones and validated pressure drop against clinical limits.
- [Supersonic Paintball Gun Barrel Aerodynamics](https://kwikraft.com/case-studies/paintball-gun-supersonic): Transient compressible flow (rhoCentralFoam, Kurganov-Tadmor scheme) analyzing shock wave formation and pressure wave propagation in a .68-caliber barrel. Peak Mach 1.2 at exit, 320 m/s muzzle velocity, 450k mesh elements.
- [Marine Diesel Engine Cold Flow Analysis](https://kwikraft.com/case-studies/diesel-engine-cold-flow): Parametric transient study with moving piston mesh (layer addition/removal) and custom coupled OpenFOAM solver integrating species transport. GUI-based parametric framework. Tumble ratio 1.2–1.8, 15% mixing efficiency improvement.
- [Room Ventilation and Air Distribution](https://kwikraft.com/case-studies/room-ventilation-hvac): Steady-state RANS (realizable k-epsilon) of pressure-driven airflow in a residential room. 450k elements, 4.5 ACH, ventilation effectiveness 0.78. Stagnant zone identification for HVAC vent optimization.
- [Camper Van Aerodynamics with Solar Panel](https://kwikraft.com/case-studies/camper-van-solar-panel): Steady-state RANS (k-omega SST) external flow analysis of a camper van with roof-mounted solar panel at 100 km/h. 1.2M elements. Drag increase 11% (Cd 0.38→0.42), panel lift force 85N, mounting stress 35 MPa.
- [Pickleball Paddle Aerodynamic Optimization](https://kwikraft.com/case-studies/pickleball-paddle-optimization): Multi-objective shape optimization coupling steady-state RANS and transient sliding-mesh CFD. 2.5M elements, B-spline parametric geometry. 18% drag reduction, peak drag 2.3N at 20 m/s swing.

## 3D Printing Projects

- [Audi RS6 Custom Aerodynamic Appendage](https://kwikraft.com/3d-printing/projects/audi-rs6-appendage): Carbon fiber reinforced PETG component from 3D fender scan. Tight geometric tolerances for curvature-matched fitment at high speeds.
- [Castel San Giorgio Scale Model](https://kwikraft.com/3d-printing/projects/castel-san-giorgio-model): High-detail architectural reproduction of the Ducal Palace castle in Mantova. Multi-part high-resolution PLA assembly with millimeter precision. Client: Valle dei Fiori.
- [VOC Filter Bodies for MAGI Group](https://kwikraft.com/3d-printing/projects/voc-filters-magi-group): Batch of 100 custom VOC filter bodies and filters in chemically inert polymers for analytical laboratory use. Hermetic sealing tolerances for volatile organic compound analysis.
- [Gym Machine Ergonomic Knob](https://kwikraft.com/3d-printing/projects/gym-machine-knob): Reinforced ABS handle with embedded steel threaded insert (insert molding during print). Ergonomic geometry validated through user testing for intensive daily gym use. Client: Black Gym Fitness.

## Technical Capabilities

**CFD Software:** OpenFOAM (simpleFoam, rhoCentralFoam, pimpleFoam, custom solvers), Blender for geometry
**Simulation Types:** Steady-state RANS, transient compressible, laminar, moving mesh, two-way FSI, species transport
**Turbulence Models:** k-omega SST, realizable k-epsilon, laminar (Navier-Stokes)
**Mesh Range:** 200k to 2.5M+ elements (hexahedral-dominant, structured/unstructured)
**3D Printing Materials:** PLA, ABS, PETG, CF-PETG, CF Nylon, UV-resistant PETG
**Processes:** FDM, insert molding, 3D scanning-to-print, batch production