<h1 style="text-align:center;">HIPE Test Facility</h1>
<div style="text-align:center"><img src="hipe.png" alt="" height="400" /></div>
<p>Two-phase flow test facility was constructed to study the applicability of Particle Image Velocimetry (PIV) and Wire-Mesh Sensors (WMS) for different types of single- and two-phase flows. Test facility was designed in such a way that it enables to conduct experiments at any inclination of the flow channel, hence the name. HIPE (=Horizontal and Inclined Pipe flow Experiments) test facility offers many possibilities to study and measure flow transitions at different inclinations. Test facility will be also used for demonstrational and educational purposes. Transparency of the channel walls and the use of WMSs offer students great possibilities to get better understanding on the physics behind the flow behavior.</p>

<p>Test section is equipped with in-house manufactured WMSs (32 × 32 wires). The sensors are recording the flow at 5000 frames/s. In addition, special channel section was designed and constructed that enables High-Speed Camera (HSC) and PIV measurements by minimizing the optical distortions. Two example images from HSC footage are shown below (Bubbly (left), Churn (right)). Some parameters of the test facility are summarized into the table.</p>

<table style="width: 100%">
    <tr>
        <td>
            <img src="flow_1.jpg" alt="" height="350" style="float:center; padding: 10px;" />
            <img src="flow_2.jpg" alt="" height="350" style="float:center; padding: 10px;" />
        </td>
        <td>
            <table border="1">

                <tr>
                    <td>Inside / Outside diameter of flow channel</td>
                    <td>50 mm / 60 mm</td>
                </tr>
                <tr>
                    <td>Length of the flow channel</td>
                    <td>3 m (can be varied)</td>
                </tr>
                <tr>
                    <td>Inclination of the flow channel (from horizontal)</td>
                    <td>0°- 90°</td>
                </tr>
                <tr>
                    <td>Material of the flow channel</td>
                    <td>PMMA</td>
                </tr>
                <tr>
                    <td>Pressure / Temperature</td>
                    <td>Atmospheric</td>
                </tr>
                <tr>
                    <td>Flow types</td>
                    <td>Water, Air-Water</td>
                </tr>
                <tr>
                    <td>Maximum superficial water flow rate</td>
                    <td>1.8 m/s</td>
                </tr>
                <tr>
                    <td>Maximum superficial air flow rate</td>
                    <td>1.2 m/s</td>
                </tr>
            </table>
        </td>

    </tr>
</table>

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