# مقالههای M.R Hajmohammadi

**توجه:**محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.

##### ۱Optimal configurations of circular–shaped heat sources in a square–shaped fin

اطلاعات انتشار:
نوزدهمین همایش سالانه مهندسی مکانیک،
سال ۱۳۹۰

تعداد صفحات:
۴

In the present paper we consider possible arrangements of two and three circular–shaped heat sources which are connected and cooled in a square fin to obtain the optimal arrangement. For each configuration the temperature and the temperature gradient field are obtained numerically while varying the location of heat sources. Constructal theory is applied to obtain the optimal location of heat sources. Here, optimization means the minimization of hot spots when the heat is removed at heat sources with constant heat flux. Also it means the maximization of the total heat removal by the fin when heat sources are at constant temperature. It is hown that the simple arrangements of heat sources such as horizontal or vertical arrangements might not be the optimum option and should be avoided. A better thermal performance could be obtained when certain configurations such as diagonal arrangement of two heat sources or triangular arrangement of three heat sources, are used.<\div>

##### ۲Determination of the optimal thickness for a flat plate with conjugate heat transfer in laminar forced convection flow

اطلاعات انتشار:
نوزدهمین همایش سالانه مهندسی مکانیک،
سال ۱۳۹۰

تعداد صفحات:
۴

Numerical simulation is performed for a conjugate heat transfer problem via ANSYS FLUENT 12.0.1 environment to optimize the thickness of a plate where the lower surface is heated with uniform heat flux. At the other surface of the plate there is a laminar boundary layer flow. Heat is then transferred to the fluid through the plate. The working temperature of the plate may exceed the desired temperature level. Since the performance of equipment has a direct relationship with its temperature, it is important to keep it at an acceptable temperature level. Consequently, here, optimization means to minimize the maximum temperature (the hot spot) at the plate such that it does not exceed a specified allowable value. It is shown that by enlarging the thickness of the plate the maximum temperature at the plate is first reduced and then increases. This conflicting behavior results in the existence of an optimal value for the thickness of the plate such that the maximum temperature at the plate is minimized.<\div>

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