The temperature increases along pipe, and the differential temperature increases with foam flow velocity decreasing.

管内温度沿管程不断升高，且流速越小温升越大；

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The flow resistance of foam is affected by those parameters such as surfactant concentration, oil saturation, temperature, permeability, water and gas phase velocity, etc.

泡沫的流动阻力受泡沫剂浓度、温度、油饱和度、渗透率以及水相和气相达西流速的影响。

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By horizontal tangent into the air filter layer, rotate and foreign get down to the oil, oil level of shock wave and flow surfaces by a foam, the air in the oil to get oil bath.

空气由水平方向切线进入过滤器的外来层，获得旋转并向下冲击油面，使油面产生波动并被气流掀起油沫，空气在此得到油浴。

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Some engines also contain onboard foam systems, so there will be controls to control the flow of foam concentrate into the discharges.

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The boys would throw all kinds of foam boats and objects down the river and see which ones would drown and how different objects would impede the flow.

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