When I derived the momentum equation in x-direction, I got this equation (directly without any manipulation) ( rho frac{Du}{Dt}=- frac{ partial p}{ partial x}+ frac{ partial tau_{xx}}{ partial x}+ frac{ partial tau_{yx}}{ partial y}+ frac{ partial tau_{zx}}{ partial z}+ rho f_x ). Which of these models have I used?

• A. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8a.png"><img alt="The momentum equation in x-direction is differential non-conservative - option a" class="alignnone size-full wp-image-248861" height="145" sizes="(max-width: 326px) 100vw, 326px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8a.png 326w, https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8a-300x133.png 300w" width="326"/></a>
• B. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8b.png"><img alt="The momentum equation in x-direction is differential non-conservative - option b" class="alignnone size-full wp-image-248862" height="151" sizes="(max-width: 326px) 100vw, 326px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8b.png 326w, https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8b-300x139.png 300w" width="326"/></a>
• C. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8c.png"><img alt="The momentum equation in x-direction is differential non-conservative - option c" class="alignnone size-full wp-image-248863" height="140" sizes="(max-width: 330px) 100vw, 330px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8c.png 330w, https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8c-300x127.png 300w" width="330"/></a>
• D. <a href="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8d.png"><img alt="The momentum equation in x-direction is differential non-conservative - option d" class="alignnone size-full wp-image-248864" height="135" sizes="(max-width: 310px) 100vw, 310px" src="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8d.png 310w, https://www.sanfoundry.com/wp-content/uploads/2019/10/computational-fluid-dynamics-questions-answers-momentum-equation-q8d-300x131.png 300w" width="310"/></a>