Conservative level set method, introduced by E. Olsson and G. Kreis in 2005 is discussed. The test case with rising bubble consists of spherical bubble of smaller density in stagnant liquid of higher density. Due to the buoyancy spherical bubble is rising up and changing its shape. After certain time the bubble reaches final velocity and final shape. An in-house code was used to perform the simulations. The final shape of the bubble was investigated and also build-up of the bubble rising velocity, starting from the rest exhibiting an overshoot before reaching its final asymptotic value. This test allows testing of numerical model which has to accurately take into account buoyancy, viscous stresses and surface tension effects.

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